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 transport protocol provides reliable, ordered delivery with acknowledgements?

  1. AICMP
  2. BIP
  3. CTCP
  4. DUDP
2.Easy

What is the default port number for HTTPS?

  1. A80
  2. B443
  3. C21
  4. D25
3.Easy

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

  1. A255.255.255.255
  2. B0.0.0.0
  3. C192.168.0.1
  4. D127.0.0.1
4.Medium

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

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

What is a cyclic redundancy check (CRC) used for in Ethernet frames?

  1. ADetecting transmission errors
  2. BCorrecting every bit error automatically
  3. CChoosing the best route
  4. DEncrypting the frame
6.Medium

Which metric does RIP use to choose routes?

  1. ABusiness policy
  2. BHop count
  3. CLink bandwidth
  4. DMeasured delay
7.Hard

Which mechanism prevents broadcast loops in a network with redundant switch links?

  1. ANAT
  2. BSpanning Tree Protocol
  3. CARP caching
  4. DDHCP snooping
8.Hard

The count-to-infinity problem occurs in which kind of routing protocol, and what helps against it?

  1. APath-vector; longer AS paths
  2. BStatic routing; adding default routes
  3. CDistance-vector; split horizon and poison reverse
  4. DLink-state; flooding link updates

Answer key

  1. 1. C · TCP
  2. 2. B · 443
  3. 3. D · 127.0.0.1
  4. 4. D · FIN
  5. 5. A · Detecting transmission errors
  6. 6. B · Hop count
  7. 7. B · Spanning Tree Protocol
  8. 8. C · Distance-vector; split horizon and poison reverse

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