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.

New worksheetPractise online with hints

For teachers: free to print, copy and use in class. Every new worksheet has new values and its own answer key. A link to ExamProblems on your course page is appreciated.

Name: ____________________   Date: ____________

1.Easy

What does a packet header mainly contain?

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

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

  1. ASMTP
  2. BDHCP
  3. CIMAP
  4. DSNMP
3.Easy

Which IPv4 address is the standard loopback address of a host?

  1. A0.0.0.0
  2. B127.0.0.1
  3. C192.168.0.1
  4. D255.255.255.255
4.Medium

What does an MX record in DNS specify?

  1. AThe IPv4 address of a web server
  2. BAn alias name for another host
  3. CThe name servers for a zone
  4. DThe mail servers that accept email for a domain
5.Medium

Which host is in the same /16 subnet as 10.1.2.3?

  1. A10.1.200.5
  2. B10.2.2.3
  3. C10.0.2.3
  4. D11.1.2.3
6.Medium

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

  1. A/8
  2. B/16
  3. C/32
  4. D/24
7.Hard

Which routing protocol is a link-state protocol?

  1. AARP
  2. BRIP
  3. COSPF
  4. DBGP
8.Hard

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

  1. AThe connection stays encrypted without TLS
  2. BSeveral requests reuse one TCP connection, avoiding repeated handshakes
  3. CThe server can push updates over UDP
  4. DResponses can arrive in any order on one stream, so slow replies do not block others

Answer key

  1. 1. C · Control information such as source and destination addresses
  2. 2. C · IMAP
  3. 3. B · 127.0.0.1
  4. 4. D · The mail servers that accept email for a domain
  5. 5. A · 10.1.200.5
  6. 6. D · /24
  7. 7. C · OSPF
  8. 8. B · Several requests reuse one TCP connection, avoiding repeated handshakes

Full step-by-step solutions: practise this topic on examproblems.com.