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Free CompTIA N10-009 Exam Questions (page: 17)

Page 17 of 104
PDF with 513 Questions

An organization moved its DNS servers to new IP addresses. After this move, customers are no longer able to access the organization's website.
Which of the following DNS entries should be updated?

  1. AAA
  2. CNAME
  3. MX
  4. NS

Answer(s): D

Explanation:

NS (Name Server) records specify which DNS servers are authoritative for the domain.
If the DNS servers' IPs change, you must update the NS records at the registrar, or no outside client will know where the domain’s authoritative DNS now resides.



Which of the following are environmental factors that should be considered when installing equipment in a building? (Choose two.)

  1. Fire suppression system
  2. UPS location
  3. Humidity control
  4. Power load
  5. Floor construction type
  6. Proximity to nearest MDF

Answer(s): A,C

Explanation:

Fire suppression systems must be designed for electronics (Halon-type or inert gas systems).

Humidity control prevents static discharge and condensation, both of which can damage network equipment.

These are direct environmental requirements for safe equipment operation.



A customer lost the connection to the telephone system. The administration console is configured with multiple network interfaces and is connected to multiple switches. The network administrator troubleshoots and verifies the following:

The support team is able to connect remotely to the administration console.

Rebooting the switch shows solid link and activity lights even on unused ports.

Rebooting the telephone system does not bring the system back online.

The console is able to connect directly to individual modules successfully.

Which of the following is the most likely reason the customer lost the connection?

  1. A switch failed.
  2. The console software needs to be reinstalled.
  3. The cables to the modules need to be replaced.
  4. A module failed.

Answer(s): D

Explanation:

All troubleshooting indicators point to only one module not responding, while the administration console and switches operate normally.
The console connects successfully to individual modules, indicating the telephone system module itself has failed.



A systems administrator is configuring a new device to be added to the network. The administrator is planning to perform device hardening prior to connecting the device.
Which of the following should the administrator do first?

  1. Update the network ACLs.
  2. Place the device in a screened subnet.
  3. Enable content filtering.
  4. Change the default admin passwords.

Answer(s): D

Explanation:

The first step in hardening any new device is changing default credentials.
Leaving default passwords in place is a major security risk since they are publicly known.



A network administrator needs to connect two network closets that are 492ft (150m) away from each other.
Which of the following cable types should the administrator install between the closets?

  1. Single-mode fiber
  2. Coaxial
  3. DAC
  4. STP

Answer(s): A

Explanation:

492 ft / 150 m exceeds copper Ethernet limits unless specialized extended-reach technologies are used.
Single-mode fiber is appropriate for long-distance backbone links and supports high bandwidth reliably.



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