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 protocol gives secure, encrypted remote login to another computer?

  1. ATelnet
  2. BFTP
  3. CSNMP
  4. DSSH
2.Easy

Which type of network covers a large geographic area, such as a whole country?

  1. AA personal area network (PAN)
  2. BA local area network (LAN)
  3. CA virtual LAN (VLAN)
  4. DA wide area network (WAN)
3.Easy

How is an IPv6 address usually written?

  1. ASix pairs of hexadecimal digits separated by dashes or colons
  2. BSixteen decimal numbers separated by dots
  3. CFour decimal numbers separated by dots
  4. DEight groups of four hexadecimal digits separated by colons
4.Medium

Which range of TCP/UDP port numbers is reserved as "well-known" ports?

  1. A1024–49151
  2. B49152–65535
  3. C0–1023
  4. D0–65535
5.Medium

Which protocol does the "ping" command use?

  1. ATCP
  2. BICMP
  3. CHTTP
  4. DUDP
6.Medium

Which subnet mask corresponds to /20?

  1. A255.255.248.0
  2. B255.255.240.0
  3. C255.255.224.0
  4. D255.255.255.240
7.Hard

A DNS cache poisoning attack aims to:

  1. ADelete DNS servers
  2. BMake a resolver store a false IP address for a domain
  3. COverload a server with traffic so that it stops answering queries
  4. DSteal Wi-Fi passwords
8.Hard

What is the maximum transmission unit (MTU) of standard Ethernet payload?

  1. A65,535 bytes
  2. B1500 bytes
  3. C9000 bytes in every network
  4. D64 bytes

Answer key

  1. 1. D · SSH
  2. 2. D · A wide area network (WAN)
  3. 3. D · Eight groups of four hexadecimal digits separated by colons
  4. 4. C · 0–1023
  5. 5. B · ICMP
  6. 6. B · 255.255.240.0
  7. 7. B · Make a resolver store a false IP address for a domain
  8. 8. B · 1500 bytes

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