Network+ (N10-004) Quiz C

When converting 192 to binary, the correct answer is 11000000. This is because in binary, each digit represents a power of 2. 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 powers of 2 for each digit, we get the decimal value of 192. In this case, the binary representation of 192 is 11000000.

The correct answer is "tracert". Tracert is a utility that is used to trace the route taken by packets across an IP network. It displays the path that packets take from the source to the destination, showing the IP addresses of each hop along the way. In this case, the result printed suggests that the packets reached the destination (172.30.0.78) in less than 1 millisecond, indicating a successful trace route.

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 flashing LEDs indicates that there may be an issue with the network interface card (NIC) itself or with the hardware it is connected to. By checking for hardware conflicts or disabled devices, the technician can identify and resolve any issues that may be causing the connectivity problem.

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 loss. This interference can disrupt the wireless connection and cause it to drop off. Cellular interference, AM radio, and FM radio are less likely to cause drop-offs in a wireless G network compared to cordless phones.

A crossover cable should be used to connect two PCs for file sharing. Unlike a straight cable, which is used to connect a PC to a router or switch, a crossover cable is specifically designed to connect two PCs directly to each other. This is necessary because PCs transmit and receive data on different pins, and a crossover cable allows the transmit pins on one PC to connect to the receive pins on the other PC, enabling direct communication between them.

A proxy server can limit the availability of the types of sites that users on a LAN have access to by acting as an intermediary between the users and the internet. It can filter and block certain websites based on predefined rules or policies set by the network administrator. By controlling and monitoring the traffic, a proxy server can restrict access to specific websites or categories of websites, ensuring that users can only access approved or permitted sites.

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

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 why the users are unable to access network resources by their names but can still connect using IP addresses.

The default port for POP3 is 110. POP3 (Post Office Protocol version 3) is a protocol used for retrieving emails from a remote server. When a client wants to retrieve emails from a POP3 server, it connects to port 110 on the server. Therefore, the correct answer is 110.

The most likely next step in troubleshooting is to determine if the user has the correct VPN address and password. This is because even though the user has established Internet connectivity, they may not be able to connect to the office via VPN if they are using incorrect VPN address or password. Reinstalling the VPN client, determining if the VPN service is running, or power cycling the VPN concentrator may not be necessary if the issue is simply due to incorrect VPN address or password.

SSH (Secure Shell) is a protocol that provides a secure method to remotely administer a server. It encrypts the data transmitted between the client and the server, ensuring that it cannot be intercepted or tampered with by unauthorized users. This makes SSH a more secure alternative to protocols like Telnet, which transmit data in clear text. SFTP (Secure File Transfer Protocol) is a secure extension of FTP, used for transferring files securely over a network. HTTP (Hypertext Transfer Protocol) is a protocol used for transmitting data over the internet, but it does not provide the same level of security as SSH.

A tone generator is the best way for a technician to identify the location of a wire in a wall. A tone generator is a device that emits a specific tone or signal that can be detected by a tone probe. The technician can attach the tone generator to one end of the wire and then use the tone probe to trace the wire's path through the wall. The tone generator will emit a continuous tone that can be easily detected, allowing the technician to accurately locate the wire.

A crossover cable is the appropriate choice for connecting two switches in different wiring closets. A crossover cable is designed to connect two devices of the same type, such as switches, without the need for a hub or a switch in between. It allows for the exchange of data between the switches by swapping the transmit and receive pairs of wires. This enables the switches to communicate and share information effectively.

The IP address 169.123.142.34 falls within the range of APIPA (Automatic Private IP Addressing) addresses, which are automatically assigned by the operating system when a device is unable to obtain an IP address from a DHCP server. APIPA addresses are used in local networks and cannot be routed over the internet, indicating that the workstation is unable to access the network due to a failure in obtaining a valid IP address.

TCP (Transmission Control Protocol) is considered a connection-oriented protocol because it establishes a reliable and ordered connection between two devices before transmitting data. It ensures that all packets are received in the correct order and retransmits any lost or corrupted packets. TCP also provides flow control and congestion control mechanisms to prevent network congestion and ensure efficient data transmission. This connection-oriented nature makes TCP suitable for applications that require reliable and error-free data transmission, such as web browsing, email, and file transfer.

The technician should check the temperature monitor next because the deployment of three large additional servers may have caused an increase in heat generation, leading to overheating issues. Monitoring the temperature will help identify if the servers are operating within the acceptable range and if any cooling measures need to be taken to resolve the network instability and other issues.

The given network address of 220.100.100.100 with a subnet mask of 255.255.255.0 can be rewritten in classless interdomain routing notation (CIDR) as 220.100.100.100 /24. In CIDR notation, the number after the slash represents the number of bits in the subnet mask, which in this case is 24. This means that the first 24 bits of the IP address are used to identify the network, while the remaining 8 bits can be used to identify hosts within the network.

Creating a new subnet for this system would be the best method for segregating the traffic. By creating a new subnet, the network administrator can separate the sales system from the rest of the network, ensuring that the traffic remains isolated and secure. This allows for better control and management of the sales system's network traffic, reducing the risk of unauthorized access or interference from other devices on the network.

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 includes the current settings and configurations of the switches, which would need to be updated to reflect the changes made during the firmware upgrade. The baseline and configuration documentation serves as a reference for future troubleshooting, maintenance, and upgrades, so it is important to keep it up to date.

SNMP (Simple Network Management Protocol) is the correct answer because it is a protocol used to monitor and manage network devices. It allows the network technician to retrieve statistics, information, and errors from network devices such as routers, switches, and servers. SNMP provides a standardized way for devices to communicate and share information, making it an essential tool for network monitoring and troubleshooting. TFTP (Trivial File Transfer Protocol) is used for file transfers, Packet sniffer is used to capture and analyze network traffic, and SMTP (Simple Mail Transfer Protocol) is used for sending email.

A Virtual Private Network (VPN) would accomplish secure remote login to an office computer. VPNs create a secure and encrypted connection over a public network, such as the internet, allowing users to access a private network remotely. This ensures that the data transmitted between the remote computer and the office computer is protected from unauthorized access or interception. Telnet, VLAN, and tagged packets do not provide the same level of security as a VPN.

The correct answer is "netstat". The netstat command is used to display active network connections, listening ports, and routing tables on a client machine. By running this command, the technician can see how many server connections are open on the client machine.

The most likely source of the problem is that the intranet server is down. This means that the internal company website is not accessible because the server hosting it is not functioning properly or is completely offline. This would explain why users can access internet web pages but not the internal company website.

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 to the home computer, they would need to use a public IP address that is routable across the Internet.

IMAP4 (Internet Message Access Protocol version 4) is the correct answer because it is a protocol that allows email to be viewed while remaining on the email server. Unlike POP3 (Post Office Protocol version 3), which downloads emails to the device, IMAP4 enables users to access and manage their emails directly on the server. This means that emails can be viewed, organized, and synced across multiple devices, providing a more flexible and convenient email experience. SMTP (Simple Mail Transfer Protocol) is responsible for sending emails, while SSL (Secure Sockets Layer) is a security protocol used to encrypt data transmitted over the internet.

CSMA/CA (Carrier Sense Multiple Access with Collision Avoidance) is the correct answer. This access method is used for wireless medium access. It is a protocol used to avoid collisions in wireless networks by having devices listen before transmitting data. This helps to reduce the chances of data collisions and improves the overall efficiency of the wireless network.

A temporary solution for the failed DNS services on the network would be to create a local host file on the PC. This file would contain mappings of IP addresses to domain names, allowing the users to access specific services using their fully qualified domain names (FQDNs) even when DNS services are not functioning properly. By creating this local host file, the PC can resolve the domain names locally without relying on the DNS services.

A switch is a networking device that allows for the segregation of collision domains. Collision domains refer to the area in a network where packets may collide with each other, causing data loss or delays. A switch uses its switching fabric to create separate collision domains for each port, ensuring that data packets are transmitted without collision within each domain. However, a switch does not segregate broadcasting domains. Broadcasting domains refer to the area in a network where broadcast messages are sent to all devices. In a switch, broadcast messages are still sent to all connected devices within the same network.

A layer two switch is responsible for forwarding data packets between devices within the same network. VLAN settings, or Virtual Local Area Network settings, allow the switch to create multiple virtual networks within the physical network. This allows for better network management, security, and segmentation of network traffic. Therefore, VLAN settings are commonly found in layer two switches.

The most likely problem is that the CAT5 cable is defective. This is because the technician has successfully installed and configured the operating system to recognize the new NIC, indicating that the NIC itself is functioning properly. If the computer still cannot access the network, it suggests that there is an issue with the connection between the NIC and the network, which is most likely caused by a defective CAT5 cable.

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 software that is installed on an individual computer and can be customized to block specific websites and ports based on the administrator's preferences. This type of firewall provides an additional layer of security for the workstation and allows the administrator to have more control over the network traffic and access to certain resources.

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Port 123 is commonly used for NTP (Network Time Protocol). NTP is a protocol used to synchronize the clocks of computers and other devices on a network. It is responsible for ensuring that all devices have accurate and synchronized time. By using port 123, NTP can communicate and exchange time information between devices, allowing them to maintain consistent and accurate timekeeping.

A DNS server uses pointer records and A records to map domain names to IP addresses. Pointer records, also known as PTR records, are used to map IP addresses to domain names, while A records are used to map domain names to IP addresses. This allows the DNS server to resolve domain names to their corresponding IP addresses, enabling communication between devices on a network.

A certifier is a tool specifically designed to test and certify the performance of network cables. It can accurately determine if a CAT5e cable is operating at optimal performance by measuring parameters such as signal strength, attenuation, and crosstalk. This tool provides detailed test reports and ensures that the cable meets industry standards for data transmission. A toner probe is used to trace and locate cables, a multimeter is used to measure electrical properties, and a butt set is used for testing telephone lines, none of which are specifically designed to evaluate the performance of CAT5e cables.

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, the network administrator can ensure that the voice streams are given priority and are not delayed by the large packets from the file sharing application. This will help to prevent congestion and improve the overall quality of the voice calls.

When a router receives a packet with a destination address for which there is no entry in the routing table, it will look for a default route. A default route is a preconfigured route that is used when there is no specific route for a destination network. In this case, since there is no entry for the network in the routing table, the router will forward the packet to the next hop address of the default route. This allows the packet to be sent to a gateway that can potentially find a valid route for the destination network.

A toner probe is a tool that enables a technician to trace cables in multiple pair wiring. It works by sending a tone or signal through one end of the cable, and the technician can then use a probe to detect the signal at the other end of the cable. This allows the technician to identify the specific cable or pair of wires they are looking for, making it easier to troubleshoot and trace connections. A toner probe is a valuable tool for network or telecommunications technicians working with complex wiring systems.

An RJ-11 connector is commonly used for telephone connections and typically has 6 positions and 2 contacts. Each contact can accommodate one wire pair, so the maximum number of wire pairs that can be used in an RJ-11 connector is 2.

The most likely cause for the intermittent problems connecting to the network shares is crosstalk and interference. This can disrupt the signal transmission between the workstation and the switch, leading to connectivity issues. The other options, such as using a crossover cable instead of a straight-through cable, not punching down the cable at the punch panel, or a cut cable within the wall, would result in a complete loss of connectivity rather than intermittent problems.

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 not only provides wireless connectivity to the devices but also has multiple Ethernet ports, in this case, four ports, allowing the computers to be connected directly to the router using Ethernet cables. This setup would enable all the computers to access the internet through the cable modem.

The network administrator should subnet the block into /26s and assign one to each VLAN. This will allow for separate addressing for each VLAN, ensuring that the voice, workstation, and server networks are isolated from each other. Subnetting into /26s will provide enough IP addresses for the approximately 50 workstations and 50 IP phones in the branch office.

The 25 pair cable would be used to connect the two devices for voice on a vertical connect. This cable is commonly used in telecommunications for connecting telephone systems and other voice communication devices. It consists of 25 pairs of wires, each color-coded for easy identification and termination. The 25 pair cable provides multiple channels for voice communication, making it suitable for connecting multiple devices in a vertical connect setup.

The correct answer is 155.52Mbps. This is the standard data transmission rate for an OC-3 line. OC stands for Optical Carrier, and the number after OC represents the transmission rate in multiples of 51.84Mbps. Therefore, OC-3 represents a transmission rate of 3 times 51.84Mbps, which equals 155.52Mbps.

E-1 is the correct answer because it is a WAN technology that uses thirty 64Kbps channels. E-1, also known as European format 1, is a digital transmission format commonly used in Europe and other parts of the world. It provides a total bandwidth of 2.048 Mbps, which is divided into 30 channels, each with a capacity of 64Kbps. This allows for simultaneous transmission of voice, data, and video over the network.

The correct answer is l0GBase-T. l0GBase-T is a type of cable that can transmit data at a rate of lOOMbps per direction. This cable type is commonly used for high-speed data transmission in networks.

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. A /22 subnet mask allows for 1024 IP addresses, which is sufficient to cover the 4 /24 ranges provided.

MPLS, Frame-relay, and ATM are all suitable for a hub and spoke WAN solution. MPLS (Multiprotocol Label Switching) is a scalable and flexible solution that allows for efficient routing of traffic between multiple locations. Frame-relay is a reliable and cost-effective solution for connecting multiple sites in a hub and spoke configuration. ATM (Asynchronous Transfer Mode) is a high-speed networking technology that supports voice, video, and data transmission, making it ideal for a hub and spoke network. ISDN, ADSL, SONET, and DOCSIS are not mentioned as suitable options for this specific requirement.

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 to the destination IP address. It will choose the route that has the most specific match, as this will provide the most accurate path to reach the destination.