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 IEEE standard family defines wired Ethernet?

  1. AIEEE 802.16
  2. BIEEE 802.3
  3. CIEEE 802.11
  4. DIEEE 802.5
2.Easy

In networking, what does bandwidth usually refer to?

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

A MAC address identifies:

  1. AA router's public IP
  2. BA network interface on the local link
  3. CA website
  4. DA user account
4.Medium

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

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

HTTP is stateless. How do websites usually keep a user logged in across requests?

  1. ABy storing the password in the URL
  2. BBy keeping the TCP connection open for days
  3. CBy giving each user a fixed IP address
  4. DWith cookies holding a session identifier or token
6.Medium

What does an MX record in DNS specify?

  1. AThe IPv4 address of a web server
  2. BThe name servers for a zone
  3. CThe mail servers that accept email for a domain
  4. DAn alias name for another host
7.Hard

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

  1. A1500 bytes
  2. B65,535 bytes
  3. C64 bytes
  4. D9000 bytes in every network
8.Hard

By the Nyquist formula, what is the maximum bit rate of a noiseless 3 kHz channel using 4 signal levels?

  1. A12 kbit/s
  2. B24 kbit/s
  3. C3 kbit/s
  4. D6 kbit/s

Answer key

  1. 1. B · IEEE 802.3
  2. 2. B · The maximum data rate a link can carry
  3. 3. B · A network interface on the local link
  4. 4. D · An IP address together with a port number
  5. 5. D · With cookies holding a session identifier or token
  6. 6. C · The mail servers that accept email for a domain
  7. 7. A · 1500 bytes
  8. 8. A · 12 kbit/s

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