Computer networks worksheet with answers

Free printable Computer networks worksheet: 8 problems from easy to exam level, with an answer key. Print it or save it as a PDF.

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Name: ____________________   Date: ____________

1.Easy

What is a network interface card (NIC)?

  1. AHardware that connects a computer to a network
  2. BA cable that links two routers
  3. CA server that stores web pages
  4. DSoftware that resolves domain names
2.Easy

Which device simply repeats every incoming signal out of all its other ports?

  1. AA firewall
  2. BA router
  3. CA switch
  4. DA hub
3.Easy

How is an IPv6 address usually written?

  1. AFour decimal numbers separated by dots
  2. BSixteen decimal numbers separated by dots
  3. CEight groups of four hexadecimal digits separated by colons
  4. DSix pairs of hexadecimal digits separated by dashes or colons
4.Medium

Why is UDP often preferred for live video calls?

  1. AUDP is required for all video
  2. BUDP guarantees every packet arrives, so the picture never freezes
  3. CLow delay matters more than retransmitting every lost packet
  4. DUDP encrypts data automatically
5.Medium

Which medium access method did classic shared (half-duplex) Ethernet use?

  1. ACSMA/CA
  2. BToken passing
  3. CTDMA
  4. DCSMA/CD
6.Medium

A signal travels 2000 km through fibre at about 2 × 10⁸ m/s. What is the propagation delay?

  1. A10 ms
  2. B1 ms
  3. C0.1 ms
  4. D100 ms
7.Hard

An 8-port switch (no VLANs) has one host on each port. How many collision domains and broadcast domains are there?

  1. A1 collision domain, 1 broadcast domain
  2. B8 collision domains, 8 broadcast domains
  3. C1 collision domain, 8 broadcast domains
  4. D8 collision domains, 1 broadcast domain
8.Hard

Which of these addresses is a public (not RFC 1918 private) IPv4 address?

  1. A10.255.0.1
  2. B192.168.255.1
  3. C172.31.0.1
  4. D172.32.0.1

Answer key

  1. 1. A · Hardware that connects a computer to a network
  2. 2. D · A hub
  3. 3. C · Eight groups of four hexadecimal digits separated by colons
  4. 4. C · Low delay matters more than retransmitting every lost packet
  5. 5. D · CSMA/CD
  6. 6. A · 10 ms
  7. 7. D · 8 collision domains, 1 broadcast domain
  8. 8. D · 172.32.0.1

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