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

Which transport protocol provides reliable, ordered delivery with acknowledgements?

  1. ATCP
  2. BICMP
  3. CIP
  4. DUDP
2.Easy

What is throughput?

  1. AThe theoretical maximum rate a link can carry under ideal conditions
  2. BThe rate at which data is actually delivered successfully
  3. CThe number of routers on a path
  4. DThe time a packet takes to cross a link
3.Easy

What does a packet header mainly contain?

  1. AThe website's text and images
  2. BThe user's actual file contents, split into equal-sized pieces
  3. CControl information such as source and destination addresses
  4. DThe cable type used for the link
4.Medium

What uniquely identifies one end of a TCP connection on the internet?

  1. AA domain name alone
  2. BA MAC address alone
  3. CAn IP address together with a port number
  4. DA subnet mask and gateway
5.Medium

A browser receives HTTP status code 404. What does it mean?

  1. AThe server had an internal error
  2. BThe requested resource was not found
  3. CThe request succeeded
  4. DThe client must log in first
6.Medium

A signal travels 2000 km through fibre at about 2 × 10⁸ m/s. What is the propagation delay?

  1. A10 ms
  2. B100 ms
  3. C1 ms
  4. D0.1 ms
7.Hard

Why does TCP choose an unpredictable initial sequence number for each connection?

  1. ATo compress the data more efficiently
  2. BTo select the best route to the destination for the segments of that connection
  3. CTo avoid confusion with old segments and make spoofed segments harder to inject
  4. DTo encrypt the payload of each segment
8.Hard

How does fragmentation differ in IPv6 compared with IPv4?

  1. AIPv6 fragments at the transport layer inside TCP
  2. BIPv6 does not allow packets larger than 576 bytes
  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

Answer key

  1. 1. A · TCP
  2. 2. B · The rate at which data is actually delivered successfully
  3. 3. C · Control information such as source and destination addresses
  4. 4. C · An IP address together with a port number
  5. 5. B · The requested resource was not found
  6. 6. A · 10 ms
  7. 7. C · To avoid confusion with old segments and make spoofed segments harder to inject
  8. 8. C · Routers never fragment IPv6 packets; only the source can, using path MTU discovery

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