CompTIA Network+ N10-009 Exam Questions in PDF

Free CompTIA N10-009 Dumps Questions (page: 9)

A network technician is troubleshooting a faulty NIC and tests the theory.
Which of the following should the technician do next?

  1. Develop a theory.
  2. Establish a plan of action.
  3. Implement the solution.
  4. Document the findings.

Answer(s): B



A network administrator is configuring access points for installation in a dense environment where coverage is often overlapping.
Which of the following channel widths should the administrator choose to help minimize interference in the 2.4GHz spectrum?

  1. 11MHz
  2. 20MHz
  3. 40MHz
  4. 80MHz
  5. 160MHz

Answer(s): B



A network manager wants to view network traffic for devices connected to a switch. A network engineer connects an appliance to a free port on the switch and needs to configure the switch port connected to the appliance.
Which of the following is the best option for the engineer to enable?

  1. Trunking
  2. Port mirroring
  3. Full duplex
  4. SNMP

Answer(s): B



A network administrator is in the process of installing 35 PoE security cameras. After the administrator installed and tested the new cables, the administrator installed the cameras. However, a small number of the cameras do not work.
Which of the following is the most likely reason?

  1. Incorrect wiring standard
  2. Power budget exceeded
  3. Signal attenuation
  4. Wrong voltage

Answer(s): B



A network administrator is troubleshooting an application issue after a firewall change. The administrator has confirmed that the port and protocol are accessible to the user, but the application is still having issues.
Which of the following tools allows the administrator to look at traffic on the application layer of the OSI model?

  1. ifconfig
  2. tcpdump
  3. nslookup
  4. traceroute

Answer(s): B



Which of the following ports should a network administrator enable for encrypted log-in to a network switch?

  1. 22
  2. 23
  3. 80
  4. 123

Answer(s): A



Which of the following is used to stage copies of a website closer to geographically dispersed users?

  1. VPN
  2. CDN
  3. SAN
  4. SDN

Answer(s): B



Which of the following appliances provides users with an extended footprint that allows connections from multiple devices within a designated WLAN?

  1. Router
  2. Switch
  3. Access point
  4. Firewall

Answer(s): C



Share your comments for CompTIA N10-009 exam with other users:

O
onibokun10
4/13/2026 7:50:14 PM

Question 129:
Correct answer: CNAME

  • A CNAME record creates an alias for a domain, so newapplication.comptia.org will resolve to whatever IP address www.comptia.org resolves to. This ensures both names point to the same resource without duplicating the IP.
  • Why not the others:
- SOA defines authoritative information for a zone. - MX specifies mail exchange servers. - NS designates name servers for a zone.
  • Notes: The alias name (newapplication.comptia.org) should not have other records if you use a CNAME for it, and CNAMEs aren’t used for the zone apex (root) domain. This scenario uses a subdomain, so a CNAME is appropriate.

J
Joe
1/20/2026 8:25:24 AM

Passed this exam 2 days ago. These questions are in the exam. You are safe to use them.

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