Network+ Quiz C

Tracert is the correct answer because it is a utility that is used to trace the route that packets take from a source to a destination on a network. In this case, the utility is being used to trace the route to the IP address 172.30.0.78 and it is showing that the packet is taking 1 millisecond to reach the destination.

When converting 192 to binary, the correct answer is 11000000. This is because in binary, each digit can have a value of either 0 or 1. Starting from the right, the first digit represents 2^0, the second digit represents 2^1, the third digit represents 2^2, and so on. By adding the corresponding values for each digit, we get the decimal value of 192. In this case, the binary representation of 192 is 11000000.

A crossover cable should be used to connect two PCs for file sharing. A crossover cable is designed to allow direct communication between two devices without the need for a hub or switch. It has a specific wiring configuration that allows the transmit and receive lines to be crossed over, enabling the PCs to send and receive data directly to each other. This is different from a straight cable, which is used to connect a PC to a hub or switch. A rollover cable is used to connect a PC to a networking device, such as a router or switch, for configuration purposes.

SSH (Secure Shell) is a protocol that provides a secure method to remotely administer a server. It encrypts the communication between the client and the server, ensuring that sensitive information such as passwords and data are protected from unauthorized access. Unlike Telnet, which sends data in plain text, SSH encrypts the data, making it much more secure. Similarly, HTTP is not designed for remote administration and does not provide encryption. SFTP (Secure File Transfer Protocol) is a secure version of FTP, which is used for transferring files, but it does not provide remote administration capabilities like SSH.

A VPN (Virtual Private Network) would accomplish remote logging into an office computer in a secure manner. VPNs create a secure and encrypted connection between the remote device and the office computer, ensuring that data transmitted between them is protected from unauthorized access. This allows the technician to securely access and control the office computer from a remote location, without the risk of data interception or compromise. Telnet, VLAN, and tagged packets do not provide the same level of security as a VPN.

TCP (Transmission Control Protocol) is considered a connection-oriented protocol because it establishes a reliable and dedicated connection between the sender and receiver before transmitting data. This connection ensures that data packets are delivered in the correct order and without errors. TCP also provides features like flow control and congestion control to manage network traffic effectively. Unlike UDP (User Datagram Protocol), which is a connectionless protocol, TCP guarantees the delivery of data packets and ensures the integrity of the transmitted data. SPX (Sequenced Packet Exchange) and IP (Internet Protocol) are also connectionless protocols, making TCP the correct answer.

A crossover cable is the appropriate choice for connecting two switches in different wiring closets. Unlike straight-through cables, which are used to connect devices of different types (e.g. switch to router), crossover cables are specifically designed to connect devices of the same type (e.g. switch to switch). Crossover cables have the transmit and receive wires crossed over, allowing the switches to communicate directly with each other. This enables them to exchange information and establish a network connection.

A proxy server would limit the availability of the types of sites that users on a LAN have access to. A proxy server acts as an intermediary between the LAN users and the internet. It can be configured to block certain websites or types of content, thereby restricting the access of LAN users. By controlling and filtering the incoming and outgoing traffic, a proxy server can limit the availability of certain sites for the LAN users.

After verifying that one of the NICs has no LEDs flashing, the next step would be to check for hardware conflicts or disabled devices. This is because a lack of LED activity on a NIC could indicate a hardware issue or a disabled device, which could be causing the connectivity problem on the web server. By checking for hardware conflicts or disabled devices, the technician can identify and resolve any issues that may be affecting the NIC's functionality and restore connectivity to the web server.

The most likely next step in troubleshooting is to determine if the user has the correct VPN address and password. This is because if the user does not have the correct VPN address or password, they will not be able to establish a connection to the office via VPN. Reinstalling the VPN client, determining if the VPN service is running, or power cycling the VPN concentrator may be potential troubleshooting steps, but they would not be the most likely next step in this scenario.

The cause of the problem is that the DNS server is not resolving correctly. This means that the DNS server is not able to translate domain names into IP addresses, which is necessary for users to access network resources. As a result, users are only able to connect to network resources using the IP address. This indicates that there is an issue with the DNS server's functionality or configuration.

The default port for POP3 is 110.

Creating a new subnet for this system would be the best method to segregate the traffic. By creating a new subnet, the network administrator can assign a different range of IP addresses to the new sales system, effectively separating it from the rest of the network. This ensures that the traffic for the new sales system remains isolated and secure. Implementing a dedicated broadcast or multicast network, or changing the IP scheme to class C addresses, would not provide the same level of segregation and security as creating a new subnet.

The issue is that the cordless phones in the user's house operate on the same frequency as the wireless network (2.4Ghz), causing interference and disconnecting the wireless connection on their laptops.

After upgrading the firmware on all the switches within the LAN, the network administrator would need to update the baseline and configuration documentation. This documentation contains information about the initial settings and configurations of the switches. By updating this documentation, the network administrator ensures that it accurately reflects the current state of the switches after the firmware upgrade. This is important for future reference and troubleshooting purposes.

The correct answer is "netstat". The netstat command is used to display active network connections on a client machine. By running this command, the technician can see how many server connections are currently open. This information can be useful for troubleshooting network issues or monitoring network activity.

The given network address 220.100.100.100 with a subnet mask of 255.255.255.0 can be rewritten in CIDR notation as 220.100.100.100 /24. This means that the first 24 bits of the IP address represent the network portion, while the remaining 8 bits represent the host portion.

A tone generator is the best way for a technician to identify the location of a wire in a wall. A tone generator can send a signal through the wire, which can then be detected using a tone probe or receiver. This allows the technician to trace the path of the wire without having to physically access it. A media tester, continuity tester, and multimeter are useful tools for other purposes, but they do not provide the same functionality as a tone generator for wire tracing.

Cordless phones are the most likely cause of a wireless connection drop-off in a wireless G network. Cordless phones operate on the same frequency range as wireless G networks, which can lead to interference and signal degradation. This interference can result in dropped connections and reduced network performance.

The most likely problem is that the IP address of the home computer (192.168.1.125) is not routable across the Internet. This is because the IP address falls within the range of private IP addresses, which are not directly accessible from the Internet. In order for the user to establish an FTP connection from the PC at work, they would need to use a public IP address that is routable across the Internet.

A switch allows segregation of collision domains but not broadcasting domains. A collision domain is a network segment where collisions can occur if multiple devices try to transmit data at the same time. A switch separates these collision domains by creating individual connections between devices, allowing for simultaneous data transmission without collisions. However, a switch does not separate broadcasting domains, meaning that broadcast messages are still transmitted to all devices connected to the switch.

A network administrator would most likely configure a host-based firewall on a workstation to block certain websites and ports. A host-based firewall is a software-based firewall that is installed directly on the workstation and can control incoming and outgoing network traffic. It allows the administrator to set specific rules and filters to block access to certain websites and ports, providing an additional layer of security for the workstation.

Port 123 is commonly used for NTP (Network Time Protocol). NTP is a networking protocol used to synchronize the time on computer systems and networks. It allows devices to maintain accurate time by syncing with a reference time source. By using port 123, NTP can communicate and exchange time information between devices, ensuring accurate timekeeping across the network.

A DNS server uses pointer records and A records. Pointer records, also known as PTR records, are used to map IP addresses to domain names. A records, on the other hand, are used to map domain names to IP addresses. The DNS server uses these records to translate domain names into their corresponding IP addresses and vice versa, allowing computers to communicate with each other over the internet.

CSMA/CA (Carrier Sense Multiple Access with Collision Avoidance) is the correct answer. It is an access method used for wireless medium access. In CSMA/CA, devices listen to the wireless medium and check if it is busy before transmitting data. If the medium is busy, they wait for a random amount of time before attempting to transmit again. This method helps to avoid collisions and ensures efficient use of the wireless medium.

A toner probe is a tool that enables a technician to trace cables in multiple pair wiring. It is used to locate and identify specific cables by sending a tone through one end of the cable and then using the probe to detect the tone at the other end. This allows the technician to easily identify and trace the path of the cables, making it a valuable tool for troubleshooting and cable management.

The technician should check the temperature monitor next because the deployment of three large additional servers may have caused an increase in heat within the rack. Excessive heat can lead to network instability and other issues with the servers. By monitoring the temperature, the technician can identify if the servers are overheating and take appropriate measures to cool them down, such as adjusting airflow or installing additional cooling systems.

A layer two switch is primarily responsible for forwarding data packets based on MAC addresses. VLAN settings, which stands for Virtual Local Area Network settings, allow the switch to create separate virtual networks within a physical network, enabling better network management and security. Therefore, VLAN settings are commonly found in a layer two switch.

The IP address 169.123.142.34 is within the range of APIPA (Automatic Private IP Addressing) addresses, which are used when a device is unable to obtain an IP address from a DHCP server. APIPA addresses are self-assigned and are not routable on the internet. This indicates that the workstation is unable to connect to the network and has automatically assigned itself an APIPA address.

A certifier is a tool specifically designed to test and certify the performance of network cables, including CAT5e cables. It measures various parameters such as signal strength, attenuation, noise, and crosstalk to determine if the cable is operating at optimal performance. This tool is commonly used by network technicians and installers to ensure that the cables meet industry standards and can support high-speed data transmission. A toner probe, multimeter, and butt set are not specifically designed for certifying network cables and may not provide accurate measurements of cable performance.

Configuring traffic shaping to reduce the bandwidth available to the file sharing application would improve voice quality. By limiting the bandwidth allocated to the file sharing application, it would prevent it from consuming excessive resources and causing delays for the smaller voice streams. This would ensure that the voice traffic is prioritized and given sufficient bandwidth for better quality.

SNMP (Simple Network Management Protocol) is a protocol used to manage and monitor network devices. It allows the network technician to retrieve device statistics, information, and errors from network devices such as routers, switches, and servers. SNMP provides a standardized way for network administrators to collect and organize information about network devices, making it the most suitable tool for the given task. TFTP is a file transfer protocol, Packet sniffer is used to capture and analyze network traffic, and SMTP is a protocol used for sending email.

The most likely cause for the intermittent problems connecting to the network shares is crosstalk and interference. Crosstalk occurs when signals from one cable interfere with signals on another cable, leading to data corruption or loss. Interference can be caused by electromagnetic interference (EMI) from nearby electrical devices or radio frequency interference (RFI) from sources like cell phones or wireless devices. In this case, since all other users are able to connect successfully, it suggests that the issue is specific to the user's network cabling rather than a larger network problem like a crossover cable or a cut cable.

The most likely source of the problem is that the intranet server is down. This means that the server hosting the internal company website is not functioning properly or is experiencing technical difficulties, which is why users are unable to access it. The other options, such as the intranet DNS entry being non-authoritative, the DHCP DNS address being incorrect, or the default gateway being incorrect, are less likely to be the cause of the issue compared to the server itself being down.

A temporary solution to the failed DNS services on the network would be to create a local host file on the PC. By creating a local host file, the PC will have a record of the specific FQDNs and their corresponding IP addresses, allowing the users to access the required services. This bypasses the need for DNS resolution and ensures that the users can still access the services they need.

IMAP4 is the correct answer because it is a protocol that allows users to view their email messages while they remain on the email server. Unlike POP3, which downloads the emails to the user's device, IMAP4 keeps the emails stored on the server, allowing users to access them from multiple devices. SMTP is a protocol used for sending emails, SSL is a security protocol used for encrypting data transmission, and POP3 is a protocol that downloads emails to the user's device.

A routable public Class A address is an IP address that can be used to route traffic on the internet. In the given options, the only address that falls within the range of Class A addresses (0.0.0.0 to 127.255.255.255) is 19.16.18.1. Therefore, 19.16.18.1 is the correct answer as it is a routable public Class A address.

An RJ-11 connector is commonly used for telephone connections and supports up to 6 positions, but typically only 4 positions are used. Each position can accommodate one wire pair, so the maximum number of wire pairs that can be used in an RJ-11 connector is 2.

When a router receives a packet with a destination address for which there is no entry in the routing table, it will follow the default route. The default route is a pre-configured route that is used when there is no specific route available for the destination network. In this case, the router will forward the packet to the next hop address specified in the default route, allowing it to reach its destination.

The most likely problem is that the CAT5 cable is defective. This is because even though the technician has successfully installed and configured the NIC, the computer still cannot access the network. This suggests that there is an issue with the physical connection between the computer and the network, which could be caused by a defective CAT5 cable.

E-1 is the correct answer because it is a WAN technology that uses thirty 64Kbps channels. E-1 is a digital transmission format that is commonly used in Europe and other parts of the world. It provides a total bandwidth of 2.048 Mbps, which is divided into thirty 64Kbps channels. These channels can be used for voice, data, or video transmission, making E-1 an efficient and versatile WAN technology.

The network administrator should subnet the block into /26s and assign one to each VLAN. By subnetting the block into /26s, the administrator can create separate subnets for each VLAN, ensuring that each VLAN has its own unique network range. This allows for better network management and security, as well as efficient allocation of IP addresses.

A four port wireless router would allow the user to connect their small network of four computers to a single cable modem. A wireless router combines the functions of a router, switch, and access point, allowing multiple devices to connect to the internet through a single modem. The four ports on the router provide wired connections for the computers, while the wireless capabilities allow for additional wireless devices to connect as well.

The standard data transmission rate for an OC-31 line is 155.52Mbps. This is the correct answer because OC-31 is a specific type of optical carrier that has a transmission rate of 155.52Mbps. The other options listed are not the standard transmission rates for an OC-31 line.

The correct answer is 80,000 meters (262,467 feet). This is the maximum distance that a 10GBase-EW connection can transmit with one repeater.

The correct answer is 192.168.0.0/22 because it includes all the given IP address ranges (192.168.0.0/24, 192.168.1.0/24, 192.168.2.0/24, 192.168.3.0/24) without including any additional ranges. The /22 subnet mask allows for a range of IP addresses from 192.168.0.0 to 192.168.3.255, which covers all the given ranges.

The 25 pair cable would be used to connect two devices for voice on a vertical connect. This type of cable is commonly used in telecommunications for connecting telephone lines and is capable of carrying multiple voice signals simultaneously. It consists of 25 pairs of twisted copper wires, providing enough capacity to handle the voice connections between the devices.

The first criterion used to select a nexthop from the routing table is the most precise matching prefix. This means that the router will look for the route with the longest prefix match for the destination IP address. The more specific the prefix match, the more accurate the route is for reaching the destination. This allows for efficient routing and ensures that the router chooses the best path based on the destination address.

MPLS, Frame-relay, and ATM are the best options for a hub and spoke WAN solution. MPLS (Multiprotocol Label Switching) is a flexible and scalable solution that allows for efficient routing of data between multiple locations. Frame-relay is a cost-effective solution that provides reliable and high-speed connections between a central hub and remote locations. ATM (Asynchronous Transfer Mode) is a high-speed networking technology that offers low latency and high bandwidth, making it suitable for a hub and spoke architecture. ISDN, ADSL, SONET, and DOCSIS are not typically used in hub and spoke WAN solutions.

The correct answer is l0GBase-T. l0GBase-T is a cable type that can transmit data at a speed of 10Gbps per direction. This makes it the fastest option among the given cable types, which include 100Base-TX, I0Base-T, and 100Base-T.