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 type of cable carries data as pulses of light?

  1. AFibre-optic cable
  2. BCoaxial cable
  3. CTwisted-pair cable
  4. DShielded copper cable
2.Easy

In which network topology is every device connected to one central switch or hub?

  1. AStar
  2. BBus
  3. CFull mesh
  4. DRing
3.Easy

What is a network interface card (NIC)?

  1. AA server that stores web pages
  2. BA cable that links two routers
  3. CSoftware that resolves domain names
  4. DHardware that connects a computer to a network
4.Medium

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

  1. A1024–49151
  2. B0–1023
  3. C49152–65535
  4. D0–65535
5.Medium

What is the IPv6 loopback address?

  1. A::
  2. Bff02::1
  3. C::1
  4. Dfe80::1
6.Medium

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

  1. AAAAA
  2. BMX
  3. CCNAME
  4. DA
7.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. AThe TCP window is too small
  2. BA duplicate MAC address on the internet
  3. CA missing or wrong default gateway
  4. DA faulty DNS server setting
8.Hard

How does fragmentation differ in IPv6 compared with IPv4?

  1. AIPv6 fragments at the transport layer inside TCP
  2. BRouters never fragment IPv6 packets; only the source can, using path MTU discovery
  3. CIPv6 does not allow packets larger than 576 bytes
  4. DIPv6 routers fragment every packet larger than 64 bytes before forwarding it on the path

Answer key

  1. 1. A · Fibre-optic cable
  2. 2. A · Star
  3. 3. D · Hardware that connects a computer to a network
  4. 4. B · 0–1023
  5. 5. C · ::1
  6. 6. A · AAAA
  7. 7. C · A missing or wrong default gateway
  8. 8. B · Routers never fragment IPv6 packets; only the source can, using path MTU discovery

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