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

In networking, what does bandwidth usually refer to?

  1. AThe number of hops to a destination
  2. BThe delay before data arrives
  3. CThe maximum data rate a link can carry
  4. DThe share of packets that are lost
2.Easy

What does DNS do?

  1. AAssigns IP addresses to devices automatically
  2. BTranslates domain names into IP addresses
  3. CEncrypts web traffic
  4. DRoutes packets between networks
3.Easy

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

  1. AFTP
  2. BSMTP
  3. CDHCP
  4. DDNS
4.Medium

Which TCP flag signals that a sender has finished sending data?

  1. APSH
  2. BFIN
  3. CURG
  4. DSYN
5.Medium

At which OSI layer does a switch normally operate?

  1. ATransport (layer 4)
  2. BData link (layer 2)
  3. CNetwork (layer 3)
  4. DPhysical (layer 1)
6.Medium

Which metric does RIP use to choose routes?

  1. ALink bandwidth
  2. BBusiness policy
  3. CHop count
  4. DMeasured delay
7.Hard

What is the main benefit of persistent connections (keep-alive) in HTTP/1.1?

  1. AThe server can push updates over UDP
  2. BSeveral requests reuse one TCP connection, avoiding repeated handshakes
  3. CThe connection stays encrypted without TLS
  4. DResponses can arrive in any order on one stream, so slow replies do not block others
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 missing or wrong default gateway
  2. BThe TCP window is too small
  3. CA faulty DNS server setting
  4. DA duplicate MAC address on the internet

Answer key

  1. 1. C · The maximum data rate a link can carry
  2. 2. B · Translates domain names into IP addresses
  3. 3. C · DHCP
  4. 4. B · FIN
  5. 5. B · Data link (layer 2)
  6. 6. C · Hop count
  7. 7. B · Several requests reuse one TCP connection, avoiding repeated handshakes
  8. 8. A · A missing or wrong default gateway

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