CompTIA N10-009 Online Practice Questions and Exam Preparation

CompTIA N10-009 Online Questions & Answers

• Question 431:

  A user is having trouble uploading files to a server. However, other users in the department are not experiencing this issue. The network administrator checks the access switch and sees multiple CRC errors on that user's switchport.

  Which of the following should the network administrator do first?

  A. Replace the uplink cable for the access switch.
  B. Replace the user's network cable.
  C. Replace the NIC for the user's PC.
  D. Replace the access switch.
  B. Replace the user's network cable.

• Question 432:

  A customer has an attached USB printer that needs to be shared with other users. The desktop team set up printer sharing. Now, the network technician needs to obtain the necessary information about the PC and share it with other users so they can connect to the printer.

  Which of the following commands should the technician use to get the required information? (Choose two.)

  A. arp
  B. route
  C. netstat
  D. tcpdump
  E. hostname
  F. ipconfig
  E. hostname
  F. ipconfig

• Question 433:

  Which of the following requires network devices to be managed ustng a different set of IP addresses?

  A. Console
  B. Split tunnel
  C. Jump box
  D. Out of band
  D. Out of band

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  Explanation

  Out of band management is a process for accessing and managing network devices and infrastructure at remote locations through a separate management plane from the production network. Out of band management requires network devices to be managed using a different set of IP addresses than the ones used for in-band management or data traffic. This provides a secure and dedicated alternate access method to administer connected devices and IT assets without using the corporate LAN.

• Question 434:

  A network engineer configures a Layer 3 switch to segment departments.

  The following configuration is applied:

  VLAN 10 Finance

  VLAN 20 HR

  Interface VLAN 10: 192.168.10.1/24

  Interface VLAN 20: 192.168.20.1/24

  Switchport Gi1/0/1 VLAN 10

  Switchport Gi1/0/2 VLAN 20

  Users in both VLANs report they cannot communicate with each other.

  Which of the following is MOST likely missing?

  A. DHCP relay
  B. Inter-VLAN routing (ip routing)
  C. Port security
  D. STP
  B. Inter-VLAN routing (ip routing)

• Question 435:

  A network administrator must implement a feature that supports redundancy and scaling on the switches at the distribution layer of the network.

  Which of the following is the best option?

  A. VLAN assignment
  B. Spanning tree
  C. Port speed
  D. Full duplex
  B. Spanning tree

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  Explanation

  The correct answer is B. Spanning tree. At the distribution layer, switch redundancy is common because multiple paths are usually built into the design to avoid a single point of failure. The problem with redundant Layer 2 paths is that they can create switching loops, broadcast storms, and unstable MAC address tables if nothing controls them. Spanning Tree Protocol solves that problem by logically blocking one or more redundant paths while still keeping those paths available as backups.

  That makes spanning tree the best fit for a feature that supports both redundancy and safe scaling. As the switched environment grows, STP helps maintain a stable topology and prevents loop-related failures. If the active path fails, a blocked redundant path can be brought into service. The other options do not address the real need. VLAN assignment is used to segment broadcast domains, but it does not manage redundant Layer 2 paths. Port speed only affects throughput on an interface. Full duplex improves communication efficiency on a link, but it also does not provide redundancy control or loop prevention.

  When a Network+ question mentions redundancy on switches and asks for the best switching feature, spanning tree is the strongest answer.

• Question 436:

  In the troubleshooting methodology, which of the following actions comes after verifying that the initial problem has been resolved?

  A. If necessary, escalating the issue
  B. Attempting to replicate the problem
  C. Documenting findings
  D. Implementing the plan
  C. Documenting findings

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  Explanation

  In the CompTIA Network+ (N10-009) troubleshooting methodology, after you verify full system functionality and confirm the original issue is resolved (including validating with the user and checking for side effects), the next step is documenting findings, actions, and outcomes. Documentation is a required closing activity because it creates an accurate record of the incident: the reported symptoms, the scope/impact, diagnostic steps taken, evidence collected (logs, commands, measurements), the root cause (if determined), the remediation performed, and the verification results. This supports knowledge sharing, speeds up future troubleshooting, and helps meet operational requirements such as change management, ticketing, and compliance controls.

  The other options occur earlier or only when resolution is not achieved. Implementing the plan happens before verification-you apply the fix or workaround and then test. Attempting to replicate the problem is typically used earlier to confirm symptoms and validate theories. Escalating is used when the technician cannot resolve the issue with available permissions, tools, or expertise. Since the problem is already verified as resolved, the proper next step is documentation.

• Question 437:

  A network administrator is notified that a user cannot access resources on the network. The network administrator checks the physical connections to the workstation labeled User and sees the Ethernet is properly connected. However, the network interface's indicator lights are not blinking on either the computer or the switch.

  Which of the following is the most likely cause?

  A. The switch failed.
  B. The default gateway is wrong.
  C. The port is shut down.
  D. The VLAN assignment is incorrect.
  C. The port is shut down.

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  Explanation

  If the port is shut down, it means that the switch has disabled the port and is not sending or receiving any traffic on it. This would explain why the network interface's indicator lights are not blinking on either the computer or the switch, and why the user cannot access resources on the network. The port could be shut down manually by the network administrator, or automatically by the switch due to security or error conditions.

• Question 438:

  A network administrator deploys new network hardware. While configuring the network monitoring server, the server could authenticate but could not determine the specific status of the hardware.

  Which of the following would the administrator most likely do to resolve the issue?

  A. Use the public community string
  B. Import the appropriate MIB
  C. Set up a switchport analyzer and forward traffic
  D. Configure SNMPv3 privacy
  B. Import the appropriate MIB

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  Explanation

  MIBs (Management Information Bases) define the variables and objects that SNMP can query on a device. If the monitoring server authenticates but cannot interpret the data, it likely lacks the correct MIB for that vendor or model. Importing the proper MIB allows the monitoring server to correctly display device status and metrics.

  Option A: Using a public community string is insecure and not related to missing MIBs.

  Option C: Switchport analyzer (SPAN) captures traffic for packet analysis, not SNMP monitoring.

  Option D: SNMPv3 privacy adds encryption but doesn't fix missing MIB interpretation.

  References:

  Domain: Network Operations -- SNMP, MIBs, network monitoring systems.

• Question 439:

  HOTSPOT

  A network technician needs to resolve some issues with a customer's SOHO network. The customer reports that some of the PCs are not connecting to the network, while others appear to be working as intended.

  INSTRUCTIONS

  Troubleshoot all the network components.

  Review the cable test results rst, then diagnose by clicking on the appropriate PC, server, and Layer 2 switch.

  Identify any components with a problem and recommend a solution to correct each problem.

  If at any time you would like to bring back the initial state of the simulation, please dick the Reset All button.

  

  

  

  

  

  

• Question 440:

  Which of the following troubleshooting steps would provide a change advisory board with the information needed to make a decision?

  A. Identify the problem.
  B. Develop a theory of probable cause.
  C. Test the theory to determine cause.
  D. Establish a plan of action.
  D. Establish a plan of action.

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  Explanation

  A Change Advisory Board (CAB) reviews and approves network changes. Before approval, they need a detailed action plan outlining the change, potential impacts, and mitigation strategies. A Plan of Action includes risk assessments, rollback procedures, and deployment steps, which are critical for decision-making.

  References:

  CompTIA Network+ (N10-009) Official Study Guide Section: Network Troubleshooting Methodologies