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  3. N10-009

CompTIA Network+ N10-009 Exam Questions in PDF

Free CompTIA N10-009 Dumps Questions (page: 15)

N10-009 PDF — 713 Questions

A network manager wants to implement a SIEM system to correlate system events.
Which of the following protocols should the network manager verify?

  1. NTP
  2. DNS
  3. LDAP
  4. DHCP

Answer(s): A



A network engineer is designing a secure communication link between two sites. The entire data stream needs to remain confidential.
Which of the following will achieve this goal?

  1. GRE
  2. IKE
  3. ESP
  4. AH

Answer(s): C



Which of the following protocols has a default administrative distance value of 90?

  1. RIP
  2. EIGRP
  3. OSPF
  4. BGP

Answer(s): B



An office is experiencing intermittent connection issues. A network engineer identifies that the issue occurs whenever someone uses the fax machine that is connected to a switch.
Which of the following should the engineer do first to resolve the issue?

  1. Run a new Cat 5 line.
  2. Enable 802.1Q tagging.
  3. Change the MTU.
  4. Configure a VLAN.

Answer(s): D



A network engineer receives a vendor alert regarding a vulnerability in a router CPU.
Which of the following should the engineer do to resolve the issue?

  1. Update the firmware.
  2. Replace the system board.
  3. Patch the OS.
  4. Isolate the system.

Answer(s): A



Which of the following fiber connector types is the most likely to be used on a network interface card?

  1. LC
  2. SC
  3. ST
  4. MPO

Answer(s): A



Which of the following connectors provides console access to a switch?

  1. ST
  2. RJ45
  3. BNC
  4. SFP

Answer(s): B



A network administrator notices interference with industrial equipment in the 2.4GHz range.
Which of the following technologies would most likely mitigate this issue? (Choose two.)

  1. Mesh network
  2. 5GHz frequency
  3. Omnidirectional antenna
  4. Non-overlapping channel
  5. Captive portal
  6. Ad hoc network

Answer(s): B,D



Viewing page 15 of 75

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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.

Swindon, United Kingdom
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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