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

Which application protocol transfers files using separate control and data connections?

  1. AHTTP
  2. BSMTP
  3. CDNS
  4. DFTP
2.Easy

What does DNS do?

  1. AAssigns IP addresses to devices automatically
  2. BEncrypts web traffic
  3. CTranslates domain names into IP addresses
  4. DRoutes packets between networks
3.Easy

What is encapsulation in layered networking?

  1. AEach layer adds its own header to the data from the layer above
  2. BCompressing packets to save bandwidth
  3. CEach layer removes the header added by the layer above before sending
  4. DEncrypting all data before sending it
4.Medium

What is the network address of the host 192.168.10.77/26?

  1. A192.168.10.128
  2. B192.168.10.64
  3. C192.168.10.0
  4. D192.168.10.76
5.Medium

A router has routes for 10.0.0.0/8 and 10.1.0.0/16. Which route does it use for a packet to 10.1.5.5?

  1. A10.0.0.0/8, because it was added first
  2. BBoth routes, splitting the traffic equally
  3. C10.1.0.0/16, because it is the longest matching prefix
  4. D10.0.0.0/8, because it covers more addresses than the /16
6.Medium

Which of these is a private IPv4 address range?

  1. A100.0.0.0/8
  2. B8.8.8.0/24
  3. C200.1.1.0/24
  4. D192.168.0.0/16
7.Hard

Why does IPv6 not need NAT for address shortage?

  1. AIPv6 only works on local networks, so addresses never need to be shared globally
  2. BIPv6 encrypts all addresses
  3. CIts 128-bit address space is large enough to give every device a global address
  4. DIPv6 does not use addresses
8.Hard

You must divide 192.168.1.0/24 into at least 5 subnets with up to 25 hosts each. Which prefix length fits best?

  1. A/26
  2. B/25
  3. C/27
  4. D/28

Answer key

  1. 1. D · FTP
  2. 2. C · Translates domain names into IP addresses
  3. 3. A · Each layer adds its own header to the data from the layer above
  4. 4. B · 192.168.10.64
  5. 5. C · 10.1.0.0/16, because it is the longest matching prefix
  6. 6. D · 192.168.0.0/16
  7. 7. C · Its 128-bit address space is large enough to give every device a global address
  8. 8. C · /27

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