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Free CompTIA N10-009 Exam Questions

Which of the following routing technologies uses a successor and a feasible successor?

  1. IS-IS
  2. OSPF
  3. BGP
  4. EIGRP

Answer(s): D

Explanation:

EIGRP maintains both a successor (primary route) and a feasible successor (backup route) using the DUAL algorithm. No other routing protocol uses this terminology.



Which of the following best describes what an organization would use port address translation for?

  1. VLANs on the perimeter
  2. Public address on the perimeter router
  3. Non-routable address on the perimeter router
  4. Servers on the perimeter

Answer(s): C

Explanation:

PAT (Port Address Translation) allows many internal non-routable private IPs to share a single public IP by translating port numbers. It is used specifically to allow private networks to communicate externally.



A company is implementing a wireless solution in a high-density environment.
Which of the following 802.11 standards is used when a company is concerned about device saturation and coverage?

  1. 802.11ac
  2. 802.11ax
  3. 802.11g
  4. 802.11n

Answer(s): B

Explanation:

802.11ax (Wi-Fi 6) is designed specifically for high-density environments. It improves performance when many devices compete for airtime by using OFDMA, better scheduling, and improved throughput efficiency.



Which of the following network traffic types is sent to all nodes on the network?

  1. Unicast
  2. Broadcast
  3. Multicast
  4. Anycast

Answer(s): B

Explanation:

A broadcast packet is delivered to all devices within the broadcast domain. Unicast is one-to-one, multicast is one-to-many (subscribed devices), and anycast delivers to the nearest of many possible receivers.



Which of the following cable types provides the highest possible transmission speed?

  1. Plenum
  2. Ethernet
  3. Fiber-optic
  4. DAC

Answer(s): C

Explanation:

Fiber-optic cabling supports the highest bandwidth and distance capabilities, far exceeding copper, DAC, or plenum-rated cables. Fiber can reach multi-gigabit and long-distance links reliably.



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