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CompTIA Network+ — Practice Exam

1.0 Networking Concepts: practice questions

Our CompTIA Network+ bank has 76 questions on this topic. Here are 5 of them with answers; the full mock exam draws from every topic, like the real one.

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Question 1

What is the broadcast address of 192.168.10.70/26?

  1. 192.168.10.63
  2. 192.168.10.255
  3. 192.168.10.95
  4. 192.168.10.127
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D. 192.168.10.127 — /26 blocks are 64 wide: .64–.127. The network is .64 and the broadcast .127.

Question 2

Which transceiver form factor is commonly used for 40 Gbps and 100 Gbps ports?

  1. SFP
  2. QSFP
  3. GBIC
  4. RJ45
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B. QSFP — Quad small form-factor pluggable modules bundle four lanes and are used for 40G (QSFP+) and 100G (QSFP28).

Question 3

Developers deploy their own code to a managed runtime without managing operating systems. Which model is this?

  1. IaaS
  2. PaaS
  3. SaaS
  4. Colocation
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B. PaaS — PaaS lets the consumer deploy applications using provider-supported languages and tools without controlling the OS or servers (NIST SP 800-145).

Question 4

Which protocol uses TCP port 3389?

  1. Remote Desktop Protocol (RDP)
  2. Session Initiation Protocol
  3. Lightweight Directory Access Protocol (LDAP)
  4. LDAPS
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A. Remote Desktop Protocol (RDP) — RDP listens on 3389 according to the N10-009 port list.

Question 5

In IPsec, which protocol provides encryption of the payload?

  1. Encapsulating Security Payload (ESP)
  2. Authentication Header (AH)
  3. Internet Key Exchange (IKE)
  4. Generic Routing Encapsulation (GRE) keepalives
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A. Encapsulating Security Payload (ESP) — ESP provides confidentiality (and can also provide integrity); AH provides integrity and authentication only (RFC 4301).

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