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

In networking, what does bandwidth usually refer to?

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

Which transport protocol provides reliable, ordered delivery with acknowledgements?

  1. ATCP
  2. BICMP
  3. CIP
  4. DUDP
3.Easy

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

  1. ADNS
  2. BSMTP
  3. CFTP
  4. DHTTP
4.Medium

What is the main purpose of a VLAN?

  1. ATo split one physical switched network into separate broadcast domains
  2. BTo encrypt all traffic between switches so other departments cannot read it
  3. CTo give each device a public IP address
  4. DTo increase the speed of every switch port
5.Medium

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

  1. A/8
  2. B/32
  3. C/16
  4. D/24
6.Medium

What is the usual order of messages when a client obtains an address from DHCP?

  1. ARequest, Offer, Discover, Acknowledge
  2. BDiscover, Request, Offer, Acknowledge
  3. COffer, Discover, Acknowledge, Request
  4. DDiscover, Offer, Request, Acknowledge
7.Hard

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

  1. AStatic routing; adding default routes
  2. BPath-vector; longer AS paths
  3. CLink-state; flooding link updates
  4. DDistance-vector; split horizon and poison reverse
8.Hard

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

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

Answer key

  1. 1. D · The maximum data rate a link can carry
  2. 2. A · TCP
  3. 3. C · FTP
  4. 4. A · To split one physical switched network into separate broadcast domains
  5. 5. D · /24
  6. 6. D · Discover, Offer, Request, Acknowledge
  7. 7. D · Distance-vector; split horizon and poison reverse
  8. 8. C · Several requests reuse one TCP connection, avoiding repeated handshakes

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