CompTIA CompTIA Certifications N10-009 Questions & Answers

• Question 221:

  Which of the following is created to illustrate the effectiveness of wireless networking coverage in a building?

  A. Logical diagram

  B. Layer 3 network diagram

  C. Service-level agreement

  D. Heat map

  Correct Answer: D

  Definition of Heat Maps:

  uk.co.certification.simulator.questionpool.PList@400c3ea8 Purpose of a Heat Map:

  Comparison with Other Options:

  Creation and Use:

  References:

  CompTIA Network+ certification materials and wireless network planning guides.

• Question 222:

  A technician is troubleshooting a user's laptop that is unable to connect to a corporate server. The technician thinks the issue pertains to routing. Which of the following commands should the technician use to identify the issue?

  A. tcpdump

  B. dig

  C. tracert

  D. arp

  Correct Answer: C

  The tracert (Traceroute) command is used to determine the path packets take from the source to the destination. It helps in identifying routing issues by showing each hop the packets pass through, along with the time taken for each hop. This command can pinpoint where the connection is failing or experiencing delays, making it an essential tool for troubleshooting routing issues.References: CompTIA Network+ study materials and common network troubleshooting commands.

• Question 223:

  Which of the following is used to describe the average duration of an outage for a specific service?

  A. RPO

  B. MTTR

  C. RTO

  D. MTBF

  Correct Answer: B

  MTTR (Mean Time to Repair) is the average time it takes to repair a system or service after a failure. It helps in measuring the downtime and planning recovery processes.

• Question 224:

  Which of the following is a characteristic of the application layer?

  A. It relies upon other layers for packet delivery.

  B. It checks independently for packet loss.

  C. It encrypts data in transit.

  D. It performs address translation.

  Correct Answer: A

  Introduction to OSI Model:

  uk.co.certification.simulator.questionpool.PList@7980bce0 Application Layer:

  Reliance on Other Layers:

  of the Options:

  Conclusion:

  References:

  CompTIA Network+ guide covering the OSI model and the specific roles and functions of each layer (see page Ref 10How to Use Cisco Packet Tracer).

• Question 225:

  Which of the following are the best device-hardening techniques for network security? (Select two).

  A. Disabling unused ports

  B. Performing regular scanning of unauthorized devices

  C. Monitoring system logs for irregularities

  D. Enabling logical security such as SSO

  E. Changing default passwords

  F. Ensuring least privilege concepts are in place

  Correct Answer: AE

  Disabling unused ports prevents unauthorized access and reduces the attack surface by ensuring that no inactive or unmonitored entry points are available for exploitation. Changing default passwords is critical for security because default credentials are widely known and can easily be exploited by attackers. These techniques are fundamental steps in hardening devices against unauthorized access and ensuring network security. References: CompTIA Network+ Exam Objectives and official study guides.

• Question 226:

  A technician is planning an equipment installation into a rack in a data center that practices hot aisle/cold aisle ventilation. Which of the following directions should the equipment exhaust face when installed in the rack?

  A. Sides

  B. Top

  C. Front

  D. Rear

  Correct Answer: D

  In a data center that uses hot aisle/cold aisle ventilation, equipment is typically installed so that cool air enters from the cold aisle (front) and hot air is exhausted to the hot aisle (rear). This configuration maximizes cooling efficiency.

• Question 227:

  A virtual machine has the following configuration:

  Pv4 address: 169.254.10.10

  ubnet mask: 255.255.0.0

  The virtual machine can reach colocated systems but cannot reach external addresses on the Internet. Which of the following Is most likely the root cause?

  A. Thesubnet mask is incorrect.

  B. TheDHCP server is offline.

  C. TheIP address is an RFC1918 private address.

  D. TheDNS server is unreachable.

  Correct Answer: B

  Understanding the 169.254.x.x Address:

  uk.co.certification.simulator.questionpool.PList@132568f3 DHCP Server Offline:

  Comparison with Other Options:

  Troubleshooting Steps:

  References:

  CompTIA Network+ study materials on IP addressing and DHCP troubleshooting.

• Question 228:

  Which of the following disaster recovery metrics is used to describe the amount of data that is lost since the last backup?

  A. MTTR

  B. RTO

  C. RPO

  D. MTBF

  Correct Answer: C

  Definition of RPO:

  uk.co.certification.simulator.questionpool.PList@207328d0 Why RPO is Important:

  Comparison with Other Metrics:

  How RPO is Used in Disaster Recovery:

  References:

  CompTIA Network+ study materials and certification guides.

• Question 229:

  Which of the following attacks would most likely cause duplicate IP addresses in a network?

  A. Rogue DHCP server

  B. DNS poisoning

  C. Social engineering

  D. Denial-of-service

  Correct Answer: A

  Definition of a Rogue DHCP Server:

  uk.co.certification.simulator.questionpool.PList@64ba8a19 Impact of a Rogue DHCP Server:

  Comparison with Other Attacks:

  Prevention and Detection:

  References:

  CompTIA Network+ study materials on network security threats and mitigation techniques.

• Question 230:

  A user notifies a network administrator about losing access to a remote file server. The network administrator is able to ping the server and verifies the current firewall rules do not block access to the network fileshare. Which of the following tools wold help identify which ports are open on the remote file server?

  A. Dig

  B. Nmap

  C. Tracert

  D. nslookup

  Correct Answer: B

  Nmap (Network Mapper) is a powerful network scanning tool used to discover hosts and services on a computer network. It can be used to identify which ports are open on a remote server, which can help diagnose access issues to services

  like a remote file server.

  Port Scanning: Nmap can perform comprehensive port scans to determine which ports are open and what services are running on those ports. Network Discovery: It provides detailed information about the host's operating system, service

  versions, and network configuration. Security Audits: Besides troubleshooting, Nmap is also used for security auditing and identifying potential vulnerabilities.

  Network References:

  CompTIA Network+ N10-007 Official Certification Guide: Covers network scanning tools and their uses.

  Nmap Documentation: Official documentation provides extensive details on how to use Nmap for port scanning and network diagnostics. Network+ Certification All-in-One uide: Discusses various network utilities, including Nmap, and

  their applications in network troubleshooting.