CompTIA N10-008 Online Practice Questions and Exam Preparation

CompTIA N10-008 Online Questions & Answers

• Question 1141:

  Which of the following is used to estimate the average life span of a device?

  A. RTO
  B. RPO
  C. MTBF
  D. MTTR
  C. MTBF

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  Explanation/Reference:

  MTBF (Mean Time Between Failures) is used to estimate the average life span or reliability of a device. It is a measure of how reliable a hardware product or component is, and it predicts the time between inherent failures of a system during operation. MTBF is typically used in the context of hardware components, systems, or devices to represent average time periods when the device is expected to operate without failure under specified conditions.

• Question 1142:

  A technician is configuring a bandwidth-monitoring tool that supports payloads of 1,600 bytes. Which of the following should the technician configure for this tool?

  A. LACP
  B. Flow control
  C. Port mirroring
  D. Jumbo frames
  D. Jumbo frames

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  Explanation/Reference:

  Jumbo frames are Ethernet frames that can carry more than the standard 1,500 bytes of payload data. Jumbo frames can support payloads of up to 9,000 bytes, depending on the network device and configuration. Jumbo frames can improve network performance by reducing the overhead of packet headers and increasing the efficiency of data transmission. Jumbo frames can also reduce the CPU utilization of the sender and receiver devices, as they require fewer interrupts and processing cycles. However, jumbo frames also have some drawbacks, such as increased latency, fragmentation, and compatibility issues. Therefore, jumbo frames should be used with caution and only in networks that support them end-toend. A technician who is configuring a bandwidth-monitoring tool that supports payloads of 1,600 bytes should enable jumbo frames for this tool, as this would allow the tool to capture and analyze more data per frame and provide more accurate and detailed results. However, the technician should also ensure that the network devices and interfaces that the tool is connected to also support jumbo frames, and that the MTU (maximum transmission unit) is set to the same value across the network path.

• Question 1143:

  A help desk technician is concerned that a client's network cable issues may be causing intermittent connectivity. Which of the following would help the technician determine if this is the issue?

  A. Run the show interface command on the switch
  B. Run the tracerouute command on the server
  C. Run iperf on the technician's desktop
  D. Ping the client's computer from the router
  E. Run a port scanner on the client's IP address
  A. Run the show interface command on the switch

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  Explanation/Reference:

  To determine if a client's network cable issues may be causing intermittent connectivity, the help desk technician can run the show interface command on the switch. This command allows the technician to view the status and statistics of the various interfaces on the switch, including the physical link status and the number of transmitted and received packets. If the interface is experiencing a large number of errors or dropped packets, this could indicate a problem with the network cable or with the connection between the client's device and the switch.

• Question 1144:

  Which of the following is the physical topology in which all devices are connected to each other?

  A. Bus
  B. Ring
  C. Mesh
  D. Star
  C. Mesh

• Question 1145:

  Following the implementation of a BYOD policy, some users in a high-density environment report slowness over the wireless connection. Some wireless controller reports indicate high latency and airttime contention. Which of the following is the most probable root cause?

  A. The AP is configured with 2.4GHz frequency, which the new personal devices do not support.
  B. The AP is configured with 2.4GHz frequency without band-steering capabilities.
  C. The AP is configured with 5Ghz frequency with band-steering capabilities.
  D. The AP is configured with 5Ghz frequency, which the new personal devices do not support
  B. The AP is configured with 2.4GHz frequency without band-steering capabilities.

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  Explanation/Reference:

  In high-density environments, using the 2.4GHz frequency without band-steering capabilities can lead to increased interference and contention, as many devices may be trying to use the same frequency. Band-steering helps distribute devices between 2.4GHz and 5GHz frequencies, optimizing the use of available spectrum and reducing contention.

• Question 1146:

  An ARP request is broadcasted and sends the following request.

  ''Who is 192.168.1.200? Tell 192.168.1.55''

  At which of the following layers of the OSI model does this request operate?

  A. Application
  B. Data link
  C. Transport
  D. Network
  E. Session
  B. Data link

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  Explanation/Reference:

  An ARP request operates at the data link layer of the OSI model. ARP (Address Resolution Protocol) is a protocol that maps IP addresses to MAC addresses on a local area network. It allows devices to communicate with each other without knowing their MAC addresses beforehand. ARP operates at the data link layer (layer 2) of the OSI model, which is responsible for framing and addressing data packets on a physical medium. References: https://www.cisco.com/c/en/us/ support/docs/ip/routing-information-protocol-rip/13788-3.html

• Question 1147:

  A user is unable to reach any resources on the internet. A technician goes to the site and obtains the following output from the workstation:

  

  Which of the following commands should the technician use to correct the issue?

  A. route ADD 0.0.0.0 MASK 0.0.0.0 10.10.51.10 metric 35
  B. route CHANGE 10.10.51.0 MASK 255.255.255.255 10.10.52.1 metric 5
  C. route CHANGE 10.10.51.255 MASK 255.0.0.0 On-Link metric 1
  D. route DELETE 127.255.255.255
  A. route ADD 0.0.0.0 MASK 0.0.0.0 10.10.51.10 metric 35

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  Explanation/Reference:

  The route command is used to view and manipulate the IP routing table in Windows operating systems456 The routing table contains information about how to reach different network destinations. The output from the workstation shows that the routing table does not have a default gateway, which is a router that forwards packets to other networks that are not directly connected to the local network. A default gateway is usually specified by a route with a destination of 0.0.0.0 and a netmask of 0.0.0.0, which matches any IP address. To correct the issue, the technician can use the route ADD command to add a default gateway to the routing table. The syntax of the command is: route ADD MASK metric The destination and netmask parameters should be 0.0.0.0 to indicate a default route. The gateway parameter should be the IP address of the router that can reach the internet, which is 10.10.51.10 in this case. The metric parameter is an optional value that indicates the cost or preference of the route, which can be used to choose between multiple routes to the same destination. A lower metric means a higher preference. The metric parameter can be any integer between 1 and 9999. In this case, the metric parameter can be 35 or any other value. Therefore, the correct command is: route ADD 0.0.0.0 MASK 0.0.0.0 10.10.51.10 metric 35

• Question 1148:

  An application is not working. When the log files are reviewed, the application continuously tries to reach the following destination:

  

  Which of the following is most likely associated with this IP address?

  A. APIPA
  B. Default gateway
  C. Link local
  D. Loopback
  D. Loopback

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  Explanation/Reference:

  The IP address ::1/128 is the loopback address of the local host in IPv6, which is the equivalent of the 127.0.0.1 in IPv4. The loopback address is a virtual interface that loops all traffic back to itself, the local host. The loopback address is used for testing and troubleshooting purposes, such as checking the connectivity and configuration of the network stack. If an application tries to reach the loopback address, it means that it is not communicating with any external network or server, but only with itself. The other options are not correct because they are not associated with the IP address ::1/128. They are: APIPA. APIPA stands for Automatic Private IP Addressing, which is a feature that allows a device to assign itself a private IPv4 address in the range of 169.254.0.0/16 when no DHCP server is available. APIPA does not apply to IPv6 addresses, and it is not related to the loopback address. Default gateway. The default gateway is the IP address of the router or device that connects a local network to other networks. The default gateway is usually the first or last usable IP address in a subnet, and it is not the same as the loopback address. Link local. Link local addresses are IPv6 addresses that are used for communication within a single network segment or link. Link local addresses have the prefix fe80::/10, and they are not routable or reachable from other networks. Link local addresses are not the same as the loopback address. References1: Loopback Address - ::1/128 - ipUpTime.net2: Network+ (Plus) Certification | CompTIA IT Certifications3: Reserved IP addresses - Wikipedia

• Question 1149:

  Which of the following is used to elect an STP root?

  A. A bridge ID
  B. A bridge protocol data unit
  C. Interface port priority
  D. A switch's root port
  A. A bridge ID

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  Explanation/Reference:

  Root bridge

  1.

  Switch elected to act as a reference point for a spanning tree

  2.

  Switch with the lowest bridge ID (BID) is elected as the root bridge

  3.

  BID is made up of a priority value and a MAC address (with the lowest value considered root)

• Question 1150:

  A network administrator is investigating a network event that is causing all communication to stop. The network administrator is unable to use SSH to connect to the switch but is able to gain access using the serial console port. While monitoring port statistics, the administrator sees the following: Which of the following is MOST likely causing the network outage?

  

  A. Duplicate IP address
  B. High collisions
  C. Asynchronous route
  D. Switch loop
  D. Switch loop

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  Explanation/Reference:

  A massive amount of broadcast packages points to a switching loop.