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 IEEE standard family defines wired Ethernet?

  1. AIEEE 802.3
  2. BIEEE 802.16
  3. CIEEE 802.11
  4. DIEEE 802.5
2.Easy

What does a VPN mainly provide?

  1. AAutomatic backup of files to a server
  2. BA faster physical connection to the internet through a dedicated line
  3. CAn encrypted tunnel across an untrusted network such as the internet
  4. DA free public IP address for every device
3.Easy

Which OSI layer transmits raw bits as electrical, optical or radio signals?

  1. APhysical layer
  2. BSession layer
  3. CNetwork layer
  4. DData link layer
4.Medium

What is the main purpose of a VLAN?

  1. ATo encrypt all traffic between switches so other departments cannot read it
  2. BTo increase the speed of every switch port
  3. CTo split one physical switched network into separate broadcast domains
  4. DTo give each device a public IP address
5.Medium

Which DNS record type maps a host name to an IPv6 address?

  1. AA
  2. BMX
  3. CAAAA
  4. DCNAME
6.Medium

Which single prefix summarises both 192.168.0.0/24 and 192.168.1.0/24?

  1. A192.168.0.0/23
  2. B192.168.0.0/25
  3. C192.168.0.0/22
  4. D192.168.1.0/23
7.Hard

After repeated collisions, classic Ethernet stations choose their waiting time from a range that doubles each time. Why?

  1. ATo lower the chance of colliding again when many stations compete
  2. BTo make the cable carry signals further
  3. CTo give the station with the highest MAC address priority on the shared cable
  4. DTo synchronise all stations to one clock
8.Hard

A PC can reach printers on its own subnet but nothing beyond it. Its IP address and mask are correct. What is the most likely fault?

  1. AA duplicate MAC address on the internet
  2. BThe TCP window is too small
  3. CA missing or wrong default gateway
  4. DA faulty DNS server setting

Answer key

  1. 1. A · IEEE 802.3
  2. 2. C · An encrypted tunnel across an untrusted network such as the internet
  3. 3. A · Physical layer
  4. 4. C · To split one physical switched network into separate broadcast domains
  5. 5. C · AAAA
  6. 6. A · 192.168.0.0/23
  7. 7. A · To lower the chance of colliding again when many stations compete
  8. 8. C · A missing or wrong default gateway

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