Introduction To TCP/IP: Trivia Exam! Quiz

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1. Which of the following is a valid e-mail address?

Explanation

The correct answer is "[email protected]" because it follows the standard format of an email address, which consists of a username (kdr), the @ symbol, and the domain name (westnetlearning.com).

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About This Quiz
Introduction To TCP/IP: Trivia Exam! Quiz - Quiz

This is an introduction to the TCP/IP quiz. The Transmission Control Protocol defines how to establish and maintain a network conversation for data exchange. How do you ensure... see morethat the internet conceptual model is applied correctly and any issues that arise are handled correctly? This is a good way to test out your skills. Give it a try and see how much revision you may need on the topic. All the best!
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2. ___________ supplies network devices reusable IP addresses, and configuration information.

Explanation

DHCP (Dynamic Host Configuration Protocol) is the correct answer because it is a network protocol that supplies network devices with reusable IP addresses and configuration information. DHCP allows devices to automatically obtain an IP address, subnet mask, default gateway, and other network settings from a DHCP server. This eliminates the need for manual IP address configuration and makes it easier to manage and allocate IP addresses within a network.

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3. Internet Protocol (IP) addresses are how many bits long?

Explanation

IP addresses are how many bits long? The correct answer is 32. An IP address is a numerical label assigned to each device connected to a computer network that uses the Internet Protocol for communication. It consists of four sets of numbers, each ranging from 0 to 255, separated by periods. Each set represents 8 bits, and since there are four sets, the total length of an IP address is 32 bits.

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4. Which device evaluates and acts upon a packet's IP address?

Explanation

A router is a device that evaluates and acts upon a packet's IP address. It is responsible for forwarding data packets between computer networks, determining the best path for the packets to reach their destination based on the IP address information. Routers are essential in directing traffic and ensuring that data is sent to the correct destination. Unlike switches or hubs, routers operate at the network layer of the OSI model and make decisions based on IP addresses rather than MAC addresses.

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5. Which of the following does a router use to make forwarding decisions?

Explanation

A router uses routing tables to make forwarding decisions. Routing tables contain information about the network topology, including the available paths and the associated costs. Based on this information, the router determines the best path to forward packets to their destination. It compares the destination IP address of the packet with the entries in the routing table to find the appropriate next hop. By using routing tables, routers can efficiently and accurately direct network traffic towards its intended destination.

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6. TCP keeps track of the segments of an e-mail message by placing _________ at the front of each piece.

Explanation

TCP keeps track of the segments of an e-mail message by placing a header at the front of each piece. The header contains important information such as the source and destination IP addresses, port numbers, sequence numbers, and other control information. This allows TCP to properly route and reassemble the segments at the receiving end, ensuring reliable delivery of the e-mail message.

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7. Which is the best reason to use the FTP application?

Explanation

The FTP (File Transfer Protocol) application is best used when you need to pass large files over a slow connection. FTP is specifically designed for efficient and reliable file transfer, making it ideal for situations where large files need to be transferred over a connection with limited bandwidth or high latency. Other applications may not be as efficient or reliable in these scenarios, making FTP the best choice.

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8. Which TCP/IP troubleshooting tool is the fastest and easiest method to evaluate whether a host is available across a TCP/IP network?

Explanation

Ping is the fastest and easiest method to evaluate whether a host is available across a TCP/IP network. Ping sends a small packet of data to the target host and waits for a response. If a response is received, it indicates that the host is available and responsive. This tool is widely used for troubleshooting network connectivity issues and determining if a host is reachable.

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9. The address 68.56.189.17 belongs to which IP class?

Explanation

The address 68.56.189.17 belongs to IP class A because it falls within the range of 1.0.0.0 to 126.0.0.0, which is reserved for class A addresses. Class A addresses have a default subnet mask of 255.0.0.0 and are used for large networks with a large number of hosts.

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10. Effective troubleshooting requires a ________ and ________ approach.

Explanation

Effective troubleshooting requires a systematic and logical approach. This means that the process of identifying and resolving issues should be done in a step-by-step manner, following a set of predefined procedures and using logical reasoning. By being systematic, troubleshooting becomes more organized and efficient, ensuring that all possible causes are considered and evaluated in a logical and structured manner. This approach helps to eliminate guesswork and ensures that problems are addressed in a methodical and effective way.

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11. Which of the following two ports are contained in the TCP header?

Explanation

The correct answer is "Destination and source." In the TCP header, the destination port and source port are included. These ports are used to identify the specific processes or services running on the destination and source devices. The destination port indicates the specific service or process that should receive the data, while the source port identifies the sending process on the source device. This information is crucial for establishing a successful TCP connection and ensuring that the data is delivered to the correct destination.

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12. How would an operator find a list of options available for the PING command?

Explanation

To find a list of options available for the PING command, an operator can type "ping" from a command line. This command will display the available options and their descriptions, allowing the operator to choose the appropriate options for their needs.

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13. Which is a valid Class B network address?

Explanation

The given IP address, 151.129.89.76, is a valid Class B network address because it falls within the range of 128.0.0.0 to 191.255.255.255. In Classful IP addressing, the first octet of a Class B address ranges from 128 to 191, indicating that the first two bits are always set to 1 and 0 respectively. Therefore, 151.129.89.76 satisfies the criteria for a Class B network address.

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14. What is the decimal equivalent of binary 11001101?

Explanation

The decimal equivalent of binary 11001101 is 205. In binary, each digit represents a power of 2, starting from the rightmost digit as 2^0. By adding up the values of each digit that is 1, we get 2^7 + 2^6 + 2^3 + 2^2 + 2^0, which equals 128 + 64 + 8 + 4 + 1, resulting in 205.

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15. A router makes its packet forwarding decision based on what information?

Explanation

A router makes its packet forwarding decision based on the information stored in its routing table. The routing table contains information about the available routes and their associated metrics, such as the destination network and the next hop address. By comparing the destination IP address of the packet with the entries in the routing table, the router determines the best path to forward the packet. The MAC address table, host table, NAT table, and gateway table are used for other purposes such as MAC address resolution, IP address resolution, network address translation, and gateway configuration, respectively.

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16. Which TCP/IP application allows a network user to remotely log on and manipulate a network device?

Explanation

Telnet is the correct answer because it is a TCP/IP application that allows a network user to remotely log on and manipulate a network device. Telnet provides a command-line interface to access and control devices such as routers, switches, and servers over a network. It enables users to execute commands, configure settings, and manage devices from a remote location. Telnet uses the Telnet protocol to establish a connection between the user's device and the remote device, providing a means for remote administration and troubleshooting.

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17. Convert the binary address 01110011.11001000.00101100.00000010 to decimal.

Explanation

The given binary address is divided into four octets: 01110011, 11001000, 00101100, and 00000010. Each octet is converted to decimal separately. The first octet, 01110011, is equal to 115 in decimal. The second octet, 11001000, is equal to 200 in decimal. The third octet, 00101100, is equal to 44 in decimal. And the fourth octet, 00000010, is equal to 2 in decimal. Therefore, the binary address 01110011.11001000.00101100.00000010 is equivalent to the decimal address 115.200.44.2.

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18. Which type of IP broadcast address targets all hosts on a specified network segment?

Explanation

The correct answer is 255.255.255.255. This is the IP broadcast address that targets all hosts on a specified network segment. When a packet is sent to this address, it is delivered to all hosts on the network, allowing for communication with all devices on the network segment. This is known as a limited broadcast address, as it is limited to the local network segment and does not extend beyond it.

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19. ******A device used to isolate an IP address's network portion from its host position is known as

Explanation

A subnet mask is used to isolate an IP address's network portion from its host position. It helps to determine which part of the IP address represents the network and which part represents the host. By using a subnet mask, the network can be divided into smaller subnetworks, allowing for more efficient use of IP addresses and better network management.

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20. Considering the default Cisco router default ADs, which of the following routes will a router consider more trustworthy than the others?

Explanation

A router will consider a static route more trustworthy than the other routes because it is manually configured by the network administrator. Static routes have a default Administrative Distance (AD) of 1, which is the lowest value among the default ADs of the given routing protocols. The lower the AD value, the more trustworthy the route is considered by the router. Therefore, a router will prioritize static routes over RIP, EIGRP, OSPF, and EGP routes when making routing decisions.

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21. Which TCP/IP Internetwork Layer Protocol provides troubleshooting utilities such as ping and traceroute?

Explanation

ICMP (Internet Control Message Protocol) is the correct answer because it is a TCP/IP Internetwork Layer Protocol that provides troubleshooting utilities such as ping and traceroute. ICMP is responsible for sending error messages and operational information about network conditions, making it useful for network diagnostics and troubleshooting. IGMP (Internet Group Management Protocol) is used for managing multicast group memberships, ARP (Address Resolution Protocol) is used for mapping IP addresses to MAC addresses, and IARP (Internet Address Resolution Protocol) is an obsolete protocol used for resolving network layer addresses.

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22. Convert the IP address 172.68.10.2 from decimal to binary.

Explanation

The given IP address 172.68.10.2 has been correctly converted from decimal to binary as 10101100.01000100.00001010.00000010.

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23. To select the best path to a destination, all routing algorithms must use ______ stored in routing tables.

Explanation

Routing algorithms use routing metrics stored in routing tables to select the best path to a destination. Routing metrics are values or criteria used to determine the optimal route, such as the number of hops, bandwidth, delay, or cost associated with each possible path. By evaluating these metrics, routing algorithms can make informed decisions on which path to choose for forwarding data packets, ensuring efficient and reliable communication within a network.

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24. A Class C network address provides for how many network and host bits?

Explanation

A Class C network address provides for 24 network bits and 8 host bits. In a Class C network, the first three octets are used for network identification, leaving only 1 octet (8 bits) for host addresses. This allows for a maximum of 2^8 (256) possible host addresses. The remaining 24 bits are used to define the network, which allows for a maximum of 2^24 (16,777,216) possible networks.

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25. Which one of the following protocols allows e-mail clients to download their messages from an e-mail server?

Explanation

POP3 (Post Office Protocol version 3) is a protocol that allows e-mail clients to download their messages from an e-mail server. It is commonly used by e-mail clients to retrieve emails from a mail server over a TCP/IP connection. DNS (Domain Name System) is a protocol used for translating domain names into IP addresses. BOOTP (Bootstrap Protocol) is a protocol used for assigning IP addresses to network devices. SMTP (Simple Mail Transfer Protocol) is a protocol used for sending e-mails between servers. DHCP (Dynamic Host Configuration Protocol) is a protocol used for automatically assigning IP addresses to network devices.

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26. Which TCP header control bit represents that the message is initiating a connection?

Explanation

The correct answer is SYN. The SYN flag in the TCP header control bit is used to initiate a connection between two devices. When a device wants to establish a connection, it sends a TCP segment with the SYN flag set to the destination device. The destination device then responds with a SYN-ACK segment to acknowledge the request and initiate the connection establishment process.

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27. Which network device allows communication between separate IP networks?

Explanation

A router is a network device that allows communication between separate IP networks. It operates at the network layer (Layer 3) of the OSI model and is responsible for forwarding data packets between different networks. Routers use routing tables to determine the best path for data transmission, ensuring that packets reach their intended destinations. Unlike hubs, bridges, and layer 2 switches, which operate at lower layers of the OSI model, routers have the capability to connect networks with different IP addresses and enable communication between them.

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28. Which of the following commands shows the path between source and destination in a TCP/IP network?

Explanation

Tracert is the correct answer because it is a command used to trace the route taken by packets from the source to the destination in a TCP/IP network. It displays the path, including the IP addresses of the routers along the way, and the time taken for each hop. Ping, Winipcfg, Ipconfig, and Fat ping are not specifically designed to show the path between source and destination in a TCP/IP network.

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29. Which TCP/IP model protocol provides reliable, sequenced, data delivery for the Application Layer?

Explanation

TCP (Transmission Control Protocol) is the correct answer because it provides reliable, sequenced data delivery for the Application Layer in the TCP/IP model. TCP ensures that data sent from one device is received accurately and in the correct order by the receiving device. It also includes mechanisms for error detection, flow control, and congestion control, making it a reliable choice for applications that require guaranteed delivery of data.

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30. Which network device allows us to connect dissimilar network topologies?

Explanation

A bridge is a network device that allows us to connect dissimilar network topologies. It operates at the data link layer of the OSI model and can connect networks with different protocols, such as Ethernet and Token Ring. A bridge examines the destination MAC address of incoming data packets and forwards them only to the appropriate network segment, reducing unnecessary network traffic. By connecting dissimilar network topologies, a bridge enables communication between different types of networks, improving network efficiency and flexibility.

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31. Which FTP command allows you to change directories within a file listing?

Explanation

The correct answer is CD. CD is the FTP command that allows you to change directories within a file listing. This command is used to navigate through different directories or folders in the FTP server. By using CD followed by the directory name, you can switch to that specific directory and view its contents.

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32. Telnet is an example of which TCP/IP layer protocol?

Explanation

Telnet is an example of an Application layer protocol in the TCP/IP model. The Application layer is responsible for providing network services to user applications. Telnet allows users to remotely access and control devices or systems over a network. It establishes a virtual terminal connection between the client and the server, enabling the user to interact with the remote system as if they were physically present.

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33. What is the binary equivalent of 136 decimal?

Explanation

The binary equivalent of 136 decimal is 100001000.

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34. Which TCP/IP protocol passes IP addressing information to any client that requests it?

Explanation

DHCP (Dynamic Host Configuration Protocol) is the correct answer because it is responsible for assigning IP addresses to client devices on a network. When a client device requests an IP address, DHCP passes the IP addressing information to that client. DNS (Domain Name System) is responsible for translating domain names into IP addresses, WINS (Windows Internet Naming Service) is an older system for name resolution in Windows networks, SMB (Server Message Block) is a protocol used for file sharing, and FTP (File Transfer Protocol) is a protocol used for transferring files over a network.

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35. Which IP packet fragmentation header field specifies where the fragment belongs in the original datagram?

Explanation

The Fragment Offset field in the IP packet fragmentation header specifies where the fragment belongs in the original datagram. This field indicates the position of the data in the original packet, allowing the receiving device to properly reassemble the fragmented packets back into the original datagram.

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36. UDP provides the ability to demultiplex data for an application based on

Explanation

UDP (User Datagram Protocol) provides the ability to demultiplex data for an application based on a destination port number. In UDP, the source and destination ports are used to identify the specific application or process that should receive the data. By examining the destination port number, the UDP protocol can deliver the incoming data to the correct application on the receiving end. This allows multiple applications to use UDP simultaneously on the same device, as each application can be identified and distinguished by its unique destination port number.

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37. Which TCP/IP protocol does a network use to find a physical address, given a logical address?

Explanation

ARP (Address Resolution Protocol) is the TCP/IP protocol used by a network to find a physical address (MAC address) when given a logical address (IP address). It is responsible for mapping the IP address to the corresponding MAC address of a device on the network. This is essential for communication between devices on the same network, as the MAC address is required for data transmission at the physical layer of the TCP/IP protocol stack.

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38. Which statement best describes NAT masquerading?

Explanation

NAT masquerading refers to a technique where multiple internal IP addresses are hidden behind a single external IP address. This allows multiple devices within a private network to access the internet using a single public IP address. The internal devices communicate with the external network through the NAT router, which modifies the source IP address of outgoing packets to match the external IP address. This way, all internal addresses are masked behind one external address, providing security and conserving IP addresses.

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39. Which of the following is used to verify if an IP process is running on another host?

Explanation

Ping is used to verify if an IP process is running on another host. It sends a small packet of data to the specified IP address and waits for a response. If a response is received, it confirms that the IP process is running on the host. Ping is commonly used to check the connectivity and response time between two devices on a network.

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40. Which is the valid Class C IP address range?

Explanation

The valid Class C IP address range is 192.000.001.hhh-223.255.254.hhh. This range includes all IP addresses starting from 192.0.1.0 to 223.255.254.255. Class C IP addresses have the first three octets reserved for network identification, while the last octet is used for host identification.

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41. A Class D address is also known as which type of address?

Explanation

A Class D address is known as a multicast address. Multicast addresses are used to send data packets to a group of devices simultaneously. Unlike unicast addresses that are used to send data to a single device, multicast addresses allow for efficient communication with multiple devices at once. This is particularly useful for applications such as video streaming or online gaming, where data needs to be sent to multiple recipients simultaneously.

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42. As a result of issuing the FTP DIR command, each file listing entry begins with a "-"; what does the "-" indicate?

Explanation

The "-" symbol indicates that the entries are files.

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43. The maximum DNS domain name length is how many characters?

Explanation

The maximum DNS domain name length is 255 characters. This limit is set by the DNS protocol and ensures that domain names can be properly resolved and managed by DNS servers. Exceeding this limit can cause issues with DNS resolution and may result in errors or failures when trying to access websites or other resources using the domain name.

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44. What happens when a dynamic NAT device runs out of addresses to assign?

Explanation

When a dynamic NAT device runs out of addresses to assign, it refuses new connections. This means that any new devices or connections attempting to use the NAT device will be denied access. This is because the NAT device has exhausted its pool of available addresses to assign to internal devices.

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45. Which is the most important of the network troubleshooting steps?

Explanation

Identifying the exact issue is the most important step in network troubleshooting because without knowing the root cause of the problem, it is impossible to find an effective solution. Once the exact issue is identified, it becomes easier to determine the appropriate steps to resolve it. Re-creating the problem, isolating the problem, testing the solution, and identifying a tool to use are all important steps in the troubleshooting process, but they all rely on first identifying the exact issue.

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46. Subnets are created by borrowing bits from the network address's __________ portion.

Explanation

Subnets are created by borrowing bits from the network address's host portion. This means that a portion of the host bits is used to create smaller subnetworks within the larger network. By borrowing these bits, the network can be divided into multiple subnets, each with its own unique network address and range of host addresses. This allows for more efficient use of IP addresses and better organization of network resources.

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47. Routers that belong to the same AS are called

Explanation

Routers that belong to the same AS (Autonomous System) are called interior neighbors. AS is a collection of networks under a single administrative domain. Interior neighbors are routers within the same AS that exchange routing information using protocols like OSPF (Open Shortest Path First) or IS-IS (Intermediate System to Intermediate System). These routers work together to determine the best paths for forwarding traffic within the AS. Exterior neighbors, on the other hand, are routers in different ASs that exchange routing information at the border of the AS.

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48. The OSI model Network Layer serves which primary purpose?

Explanation

The OSI model Network Layer serves the primary purpose of using layer 3 addresses to create multiple routed networks. This means that it is responsible for addressing and routing data packets across different networks. Layer 3 addresses, also known as IP addresses, are used to identify devices and determine the best path for data transmission. By creating multiple routed networks, the Network Layer enables communication between different networks and ensures efficient and reliable data transfer.

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49. ********If we borrow 3 bits from a Class C network address, how many useable subnets have we created?

Explanation

By borrowing 3 bits from a Class C network address, we are increasing the number of available subnets. Each borrowed bit doubles the number of subnets. Since we borrowed 3 bits, we have 2^3 = 8 subnets. Therefore, we have created 8 usable subnets by borrowing 3 bits from a Class C network address.

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50. At which point in the lease period does the client first attempt to renew the lease?

Explanation

The client first attempts to renew the lease at the 50% point in the lease period. This means that halfway through the lease, the client will initiate the process of renewing the lease agreement. This could involve negotiating new terms, extending the lease duration, or discussing any changes or updates needed.

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51. The TCP/IP model Application Layer maps to which three OSI model layers?

Explanation

The TCP/IP model Application Layer maps to the Application, Session, and Presentation layers of the OSI model. The Application layer in the TCP/IP model is responsible for providing services to the end-user applications, such as email, web browsing, and file transfer. The Session layer manages the communication sessions between applications, while the Presentation layer handles the data formatting and encryption. These three layers in the OSI model are closely related to the functionalities provided by the TCP/IP Application Layer.

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52. Which basic Telnet command opens a session to a specified host?

Explanation

The basic Telnet command "Open" is used to establish a session with a specified host. This command allows the user to connect to a remote host by specifying its IP address or domain name. By using the "Open" command, the user can initiate a Telnet session and interact with the remote host's command-line interface.

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53. TCP establishes which type of circuit between applications?

Explanation

TCP (Transmission Control Protocol) establishes a virtual circuit between applications. This means that it creates a logical connection between the sender and receiver, even though the data is actually being transmitted over an underlying physical network. This virtual circuit ensures reliable and ordered delivery of data packets, as well as handling flow control and congestion control. The use of a virtual circuit allows TCP to provide a reliable and connection-oriented communication service to applications.

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54. The Network Layer must do what to a received frame first in order to determine the route over which it will forward the datagram to the next network?

Explanation

The Network Layer must decapsulate the packet first in order to determine the route over which it will forward the datagram to the next network. Decapsulation refers to the process of removing the headers added by the previous network layers. By decapsulating the packet, the Network Layer can access the necessary information, such as the destination IP address, to determine the appropriate route for forwarding the datagram.

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55. Which UDP port number indicates active users?

Explanation

not-available-via-ai

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56. In order to automatically build a routing table, which type of indirect routing must a router use?

Explanation

A router must use dynamic routing in order to automatically build a routing table. Dynamic routing protocols allow routers to exchange information about network topology and automatically update their routing tables based on this information. This enables routers to adapt to changes in the network, such as new connections or failures, without manual intervention. This is in contrast to static routing, where routes are manually configured and do not change unless modified by an administrator. Default routing, stub routing, and bandwidth routing do not involve the automatic exchange of routing information and therefore do not enable the router to build a routing table automatically.

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57. Which network address represents a default route?

Explanation

A default route is a route that is used when no other specific route exists for a given destination. In this case, the correct answer is 0.0.0.0/0 because it represents the default route. The IP address 0.0.0.0 is used to indicate all IP addresses or any IP address, and the subnet mask /0 means that all bits in the IP address are considered to be part of the network address. Therefore, 0.0.0.0/0 represents the default route.

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58. Which of the following is the primary purpose of the OSI model Transport Layer?

Explanation

The primary purpose of the OSI model Transport Layer is to define well-known logical port addresses for communications between applications. This layer ensures that data is properly segmented, transmitted, and reassembled between the source and destination applications. It also provides reliable and efficient end-to-end delivery of data by implementing flow control, error detection and correction, and congestion control mechanisms. By assigning specific port numbers to different applications, the Transport Layer enables multiple applications to communicate simultaneously on a single device.

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59. Which network segment hosts respond to an ARP request?

Explanation

When an ARP request is sent, only the target host, which is the host being addressed in the request, will respond. The other options are incorrect because the router does not respond on behalf of all segment hosts, the ARP server does not respond on behalf of the segment hosts, and all devices running IP addresses do not respond to the ARP request. Therefore, the correct answer is that only the target host responds.

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60. Which is the valid Class A IP address range?

Explanation

The valid Class A IP address range is from 1.0.0.0 to 126.255.255.255. The given answer option 1.hhh.hhh.hhh-127.hhh.hhh.hhh falls within this range, making it the correct answer.

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61. Which router protocol type shares routing information within AS?

Explanation

IGP stands for Interior Gateway Protocol, which is a type of router protocol that is used to share routing information within an Autonomous System (AS). It is designed to facilitate communication and routing within a single organization or network. IGP protocols such as OSPF (Open Shortest Path First) and RIP (Routing Information Protocol) are commonly used within AS to exchange routing information between routers. Therefore, IGP is the correct answer as it specifically refers to the type of router protocol that shares routing information within AS.

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62. How many ICMP packets does the Tracert utility send per hop?

Explanation

The Tracert utility sends three ICMP packets per hop. Tracert is a network diagnostic tool used to trace the route taken by packets across an IP network. It works by sending a series of ICMP Echo Request packets with increasing Time to Live (TTL) values. Each hop along the route decrements the TTL value until it reaches zero, at which point the packet is discarded and an ICMP Time Exceeded message is sent back to the source. By sending three packets per hop, Tracert ensures more accurate results and helps identify any potential network issues.

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63. Which IP protocol allows a diskless workstation to contact a server and obtain an IP address?

Explanation

The correct answer is RARP. RARP (Reverse Address Resolution Protocol) is used by diskless workstations to obtain an IP address from a server. It allows the workstation to send its MAC address to the server and request an IP address in return. This is particularly useful in situations where a workstation does not have a permanent storage device to store its IP address configuration.

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64. Which of the following helps to determine local addressing information?

Explanation

Winipcfg is a Windows command-line utility that helps determine local addressing information. It displays the IP configuration settings of a computer, including the IP address, subnet mask, default gateway, and DNS servers. This information is essential for troubleshooting network connectivity issues and configuring network settings. Ping is used to test network connectivity by sending ICMP echo requests to a specific IP address or hostname. Tracert is used to trace the route packets take from the source to the destination. ARP is used to map an IP address to a physical MAC address. TFTP is a file transfer protocol used for transferring files over a network.

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65. Winipcfg displays which of the following element of client configuration information?

Explanation

Winipcfg is a Windows command-line utility that displays the client configuration information of a computer. It provides details about the network settings, including the IP address, subnet mask, DNS server, and default gateway. The default gateway is the IP address of the router or gateway device that connects the local network to other networks or the internet. It is responsible for routing the network traffic between different networks. Therefore, the correct answer is "Default gateway."

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66. HTTP is what type of protocol?

Explanation

HTTP is a stateless protocol, meaning that it does not retain any information about previous requests or sessions. Each request and response is independent of any others, and the server does not store any data about the client's state. This allows for faster and more efficient communication between client and server, as there is no need to constantly maintain and update session information. However, it also means that the server cannot remember any previous interactions with the client, and each request must contain all the necessary information for the server to process it.

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67. Which is the IP header protocol number used to specify that the packet's contents were created with TCP?

Explanation

The correct answer is 6. In the IP header, the protocol field is used to specify the protocol used in the packet's data payload. The value 6 corresponds to TCP (Transmission Control Protocol), which is a reliable and connection-oriented protocol used for data transmission over networks. Therefore, when the protocol field is set to 6 in the IP header, it indicates that the packet's contents were created using TCP.

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68. Regarding assigning IP addresses, the bits that define the __________ of an IP address should not be all 0 bits.

Explanation

The bits that define the network portion of an IP address should not be all 0 bits. This is because having all 0 bits in the network portion would indicate that the IP address is referring to the default network or the network address itself. In IP addressing, the network portion is used to identify the network to which a device belongs, while the host portion identifies the specific device within that network. Therefore, having all 0 bits in the network portion would result in an invalid IP address.

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69. NAT IP address translation assigns external addresses to internal devices in which way?

Explanation

NAT IP address translation assigns external addresses to internal devices by assigning the internal address to one of a pool of external addresses. This means that multiple internal devices can share the same external IP address, allowing for more efficient use of limited IP addresses.

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70. Routing loops are a potential problem with

Explanation

Flat networks are more prone to routing loops compared to hierarchical networks. In a flat network, all devices are connected to a single network segment, resulting in a larger broadcast domain. This increases the likelihood of routing loops occurring, where packets continuously loop between routers, unable to reach their destination. In contrast, hierarchical networks divide the network into smaller segments or subnets, reducing the broadcast domain and minimizing the chances of routing loops. Gateway protocols, routing tables, and OSPF routing are not specifically associated with routing loops, making them less likely to be the correct answer.

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71. You are troubleshooting an intermittent application error on your subnetted TCP/IP network. You suspect an old router may be dropping large packets. Which Ping command option allows you to specify the packet buffer size for each ping packet?

Explanation

The correct answer is "Ping -1". The "-1" option allows you to specify the packet buffer size for each ping packet. This can help you determine if the old router is dropping large packets by sending ping packets with different buffer sizes and observing the results.

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72. Which type of software does a mail server use to transfer mail between different types of e-mail programs?

Explanation

A mail server uses a gateway software to transfer mail between different types of e-mail programs. A gateway acts as a bridge between different systems or networks, allowing them to communicate and exchange information. In the context of a mail server, a gateway software enables the transfer of emails between different email programs, ensuring compatibility and seamless communication.

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73. What is the correct destination UDP port number for a DHCPDISCOVER message?

Explanation

The correct destination UDP port number for a DHCPDISCOVER message is 67. DHCPDISCOVER is a DHCP message used by a client to discover DHCP servers available on the network. The client sends this message to the destination IP address 255.255.255.255, which is the broadcast address, and the destination UDP port number 67. The DHCP server listens on port 67 for DHCPDISCOVER messages and responds with a DHCPOFFER message.

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74. ******Where does the DNS namespace begin?

Explanation

The DNS namespace begins with the root, which is the highest level in the hierarchy. However, the question specifically asks where the DNS namespace begins, not where it ends. Therefore, the correct answer is top-level domains, as they are the first level below the root in the DNS hierarchy.

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75. On which network type is a static route best used?

Explanation

A static route is best used in a stub routing network type. In stub routing, there is only one route to a specific destination, and there are no alternate paths or redundancy. Static routes are manually configured by the network administrator and provide a fixed path for traffic to follow. This is suitable for stub routing because there are no changes or updates needed in the routing table.

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76. *********Which is the result of adding the IP address 23.176.224.18 with the subnet mask 255.224.0.0?

Explanation

The given question asks for the result of adding the IP address 23.176.224.18 with the subnet mask 255.224.0.0. When adding an IP address with a subnet mask, the result is obtained by performing a bitwise AND operation between the IP address and the subnet mask. In this case, the bitwise AND operation between 23.176.224.18 and 255.224.0.0 gives the result 23.176.224.0. Therefore, the correct answer is 23.176.224.0.

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77. Zones maintain domain name information in which record types?

Explanation

Resource records maintain domain name information in zones.

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78. *****Which DHCP option code is used for specifying vendor specific options?

Explanation

DHCP option code 8 is used for specifying vendor specific options. This option allows vendors to define their own options and provide additional configuration parameters specific to their devices or services. By using option code 8, vendors can customize the DHCP configuration to meet the specific requirements of their products or network services.

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79. ********Which represents the prefix bits for the subnet mask 255.255.0.0?

Explanation

The subnet mask 255.255.0.0 has 16 bits set to 1, representing the network portion of the IP address. The prefix length is the number of bits set to 1 in the subnet mask. In this case, there are 11 bits set to 1, indicating a prefix length of /11.

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80. ***** DVAs operate in which manner?

Explanation

DVAs (Distributed Virtual Appliances) operate by sending routing messages that contain information about the states and metrics of the attached links. This allows them to determine the best path to a destination network based on the current network conditions. By sharing this information with other routers, they can collectively compute the most efficient routes for data transmission. This method helps to optimize routing and reduce network congestion by dynamically adapting to changes in the network topology.

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