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 IPv4 address is the standard loopback address of a host?

  1. A0.0.0.0
  2. B127.0.0.1
  3. C255.255.255.255
  4. D192.168.0.1
2.Easy

What is encapsulation in layered networking?

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

How many bits does an IPv4 address have?

  1. A128
  2. B32
  3. C64
  4. D16
4.Medium

What is the purpose of the TCP three-way handshake?

  1. ATo establish a connection and synchronise sequence numbers
  2. BTo close a connection quickly
  3. CTo encrypt the data
  4. DTo find the IP address of a host before data can be sent to it
5.Medium

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

  1. A/24
  2. B/32
  3. C/16
  4. D/8
6.Medium

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

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

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

  1. A64 bytes
  2. B9000 bytes in every network
  3. C65,535 bytes
  4. D1500 bytes
8.Hard

How does fragmentation differ in IPv6 compared with IPv4?

  1. AIPv6 routers fragment every packet larger than 64 bytes before forwarding it on the path
  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 fragments at the transport layer inside TCP

Answer key

  1. 1. B · 127.0.0.1
  2. 2. B · Each layer adds its own header to the data from the layer above
  3. 3. B · 32
  4. 4. A · To establish a connection and synchronise sequence numbers
  5. 5. A · /24
  6. 6. D · 192.168.0.0/23
  7. 7. D · 1500 bytes
  8. 8. B · Routers never fragment IPv6 packets; only the source can, using path MTU discovery

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