Free CompTIA N10-009 Exam Questions (page: 7)

A company is hosting a secure server that requires all connections to the server to be encrypted. A junior administrator needs to harden the web server. The following ports on the web server are open:



Which of the following ports should be disabled?

  1. 22
  2. 80
  3. 443
  4. 587

Answer(s): B

Explanation:

Disabling port 80 (HTTP) ensures that all traffic is forced through encrypted HTTPS on port 443.



Which of the following is the next step to take after successfully testing a root cause theory?

  1. Determine resolution steps.
  2. Duplicate the problem in a lab.
  3. Present the theory for approval.
  4. Implement the solution to the problem.

Answer(s): A

Explanation:

Once the theory is confirmed, the next step is to create a plan of action, which includes determining the resolution steps.



A network administrator is configuring a new switch and wants to ensure that only assigned devices can connect to the switch.
Which of the following should the administrator do?

  1. Configure ACLs.
  2. Implement a captive portal.
  3. Enable port security.
  4. Disable unnecessary services.

Answer(s): C

Explanation:

Port security restricts which MAC addresses are allowed on an interface, preventing unauthorized devices from connecting.



A customer needs six usable IP addresses.
Which of the following best meets this requirement?

  1. 255.255.255.128
  2. 255.255.255.192
  3. 255.255.255.224
  4. 255.255.255.240

Answer(s): D

Explanation:

A subnet with six usable addresses requires a /29, which corresponds to 255.255.255.248.
However, among the options, the smallest mask that still exceeds the requirement is /28 = 255.255.255.240, providing 14 usable hosts.



A user reports having intermittent connectivity issues to the company network. The network configuration for the user reveals the following:

IP address: 192.168.1.10
Subnet mask: 255.255.255.0
Default gateway: 192.168.1.254

The network switch shows the following ARP table:



Which of the following is the most likely cause of the user's connection issues?

  1. A port with incorrect VLAN assigned
  2. A switch with spanning tree conflict
  3. Another PC with manually configured IP
  4. A router with overlapping route tables

Answer(s): C

Explanation:

Two different MAC addresses mapping to the same IP indicates an IP conflict, usually caused by another device configured with a static IP.



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