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

  1. Anslookup
  2. Bipconfig
  3. Cnetstat
  4. Dtraceroute (tracert on Windows)
2.Easy

What is the default port number for HTTPS?

  1. A80
  2. B443
  3. C25
  4. D21
3.Easy

What does "latency" mean in networking?

  1. AThe delay for data to travel from source to destination
  2. BThe error rate of a cable
  3. CThe number of devices on a network
  4. DThe maximum amount of data per second that a link can carry
4.Medium

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

  1. APSH
  2. BFIN
  3. CSYN
  4. DURG
5.Medium

Which single prefix summarises both 192.168.0.0/24 and 192.168.1.0/24?

  1. A192.168.0.0/23
  2. B192.168.0.0/25
  3. C192.168.0.0/22
  4. D192.168.1.0/23
6.Medium

Which range of TCP/UDP port numbers is reserved as "well-known" ports?

  1. A1024–49151
  2. B0–65535
  3. C0–1023
  4. D49152–65535
7.Hard

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

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

Which routing protocol is a link-state protocol?

  1. AOSPF
  2. BRIP
  3. CARP
  4. DBGP

Answer key

  1. 1. D · traceroute (tracert on Windows)
  2. 2. B · 443
  3. 3. A · The delay for data to travel from source to destination
  4. 4. B · FIN
  5. 5. A · 192.168.0.0/23
  6. 6. C · 0–1023
  7. 7. D · Several requests reuse one TCP connection, avoiding repeated handshakes
  8. 8. A · OSPF

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