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

Which transport protocol provides reliable, ordered delivery with acknowledgements?

  1. AIP
  2. BTCP
  3. CICMP
  4. DUDP
2.Easy

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

  1. Atraceroute (tracert on Windows)
  2. Bnetstat
  3. Cipconfig
  4. Dnslookup
3.Easy

What does a VPN mainly provide?

  1. AA faster physical connection to the internet through a dedicated line
  2. BAutomatic backup of files to a server
  3. CAn encrypted tunnel across an untrusted network such as the internet
  4. DA free public IP address for every device
4.Medium

Which medium access method did classic shared (half-duplex) Ethernet use?

  1. ACSMA/CD
  2. BToken passing
  3. CCSMA/CA
  4. DTDMA
5.Medium

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

  1. AURG
  2. BSYN
  3. CPSH
  4. DFIN
6.Medium

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

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

Stations A and C both reach access point B but cannot hear each other, so their frames collide at B. How does 802.11 help?

  1. ABy routing A's frames through C
  2. BBy making A and C use collision detection so they stop sending when frames overlap
  3. COptional RTS/CTS exchanges: the AP's CTS tells all nearby stations to wait
  4. DBy increasing the TTL of the frames
8.Hard

How does fragmentation differ in IPv6 compared with IPv4?

  1. AIPv6 routers fragment every packet larger than 64 bytes before forwarding it on the path
  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 fragments at the transport layer inside TCP

Answer key

  1. 1. B · TCP
  2. 2. A · traceroute (tracert on Windows)
  3. 3. C · An encrypted tunnel across an untrusted network such as the internet
  4. 4. A · CSMA/CD
  5. 5. D · FIN
  6. 6. C · The requested resource was not found
  7. 7. C · Optional RTS/CTS exchanges: the AP's CTS tells all nearby stations to wait
  8. 8. C · Routers never fragment IPv6 packets; only the source can, using path MTU discovery

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