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 command shows the routers a packet passes through on its way to a destination?

  1. Anslookup
  2. Btraceroute (tracert on Windows)
  3. Cipconfig
  4. Dnetstat
2.Easy

Which application protocol transfers files using separate control and data connections?

  1. ADNS
  2. BFTP
  3. CSMTP
  4. DHTTP
3.Easy

Which protocol lets an email client read mail while keeping messages and folders on the server?

  1. ASNMP
  2. BIMAP
  3. CSMTP
  4. DDHCP
4.Medium

How many usable host addresses does a /26 IPv4 subnet have?

  1. A30
  2. B64
  3. C126
  4. D62
5.Medium

How many usable host addresses does a /24 IPv4 network have?

  1. A254
  2. B256
  3. C252
  4. D255
6.Medium

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

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

What does BGP mainly do on the internet?

  1. AExchanges routing information between autonomous systems
  2. BAssigns IP addresses to home users through their internet providers
  3. CEncrypts data between routers
  4. DResolves names to addresses
8.Hard

A TCP connection has a 64 KB window and a 100 ms round-trip time, and no window scaling. What is its approximate maximum throughput?

  1. AAbout 0.5 Mbit/s
  2. BAbout 640 Mbit/s
  3. CAbout 50 Mbit/s
  4. DAbout 5 Mbit/s

Answer key

  1. 1. B · traceroute (tracert on Windows)
  2. 2. B · FTP
  3. 3. B · IMAP
  4. 4. D · 62
  5. 5. A · 254
  6. 6. B · 192.168.0.0/23
  7. 7. A · Exchanges routing information between autonomous systems
  8. 8. D · About 5 Mbit/s

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