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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1.Easy

What is a network interface card (NIC)?

  1. AA server that stores web pages
  2. BSoftware that resolves domain names
  3. CHardware that connects a computer to a network
  4. DA cable that links two routers
2.Easy

Which protocol automatically gives devices an IP address on a local network?

  1. ASMTP
  2. BDHCP
  3. CDNS
  4. DFTP
3.Easy

What does "latency" mean in networking?

  1. AThe error rate of a cable
  2. BThe delay for data to travel from source to destination
  3. CThe maximum amount of data per second that a link can carry
  4. DThe number of devices on a network
4.Medium

What is a cyclic redundancy check (CRC) used for in Ethernet frames?

  1. ADetecting transmission errors
  2. BChoosing the best route
  3. CEncrypting the frame
  4. DCorrecting every bit error automatically
5.Medium

What is the IPv6 loopback address?

  1. A::
  2. Bff02::1
  3. Cfe80::1
  4. D::1
6.Medium

What does a subnet mask of 255.255.255.0 correspond to in CIDR notation?

  1. A/24
  2. B/8
  3. C/32
  4. D/16
7.Hard

How does fragmentation differ in IPv6 compared with IPv4?

  1. AIPv6 does not allow packets larger than 576 bytes
  2. BIPv6 fragments at the transport layer inside TCP
  3. CRouters never fragment IPv6 packets; only the source can, using path MTU discovery
  4. DIPv6 routers fragment every packet larger than 64 bytes before forwarding it on the path
8.Hard

What does TCP fast retransmit do?

  1. ASkips the three-way handshake when reconnecting to known hosts, so data is resent sooner
  2. BResends a segment after three duplicate ACKs, without waiting for the timeout
  3. CDoubles the window after every loss
  4. DResends every segment twice to be safe

Answer key

  1. 1. C · Hardware that connects a computer to a network
  2. 2. B · DHCP
  3. 3. B · The delay for data to travel from source to destination
  4. 4. A · Detecting transmission errors
  5. 5. D · ::1
  6. 6. A · /24
  7. 7. C · Routers never fragment IPv6 packets; only the source can, using path MTU discovery
  8. 8. B · Resends a segment after three duplicate ACKs, without waiting for the timeout

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