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 type of network covers a large geographic area, such as a whole country?

  1. AA virtual LAN (VLAN)
  2. BA local area network (LAN)
  3. CA wide area network (WAN)
  4. DA personal area network (PAN)
2.Easy

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

  1. Aipconfig
  2. Btraceroute (tracert on Windows)
  3. Cnetstat
  4. Dnslookup
3.Easy

How many layers does the OSI reference model have?

  1. A7
  2. B9
  3. C4
  4. D5
4.Medium

What is the role of a default gateway on a host?

  1. AIt is the DNS server
  2. BIt is the switch port the host is connected to
  3. CIt is the router used for traffic to other networks
  4. DIt assigns MAC addresses
5.Medium

What uniquely identifies one end of a TCP connection on the internet?

  1. AA MAC address alone
  2. BA domain name alone
  3. CAn IP address together with a port number
  4. DA subnet mask and gateway
6.Medium

What is the IPv6 loopback address?

  1. A::
  2. Bff02::1
  3. Cfe80::1
  4. D::1
7.Hard

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

  1. ANAT
  2. BARP caching
  3. CDHCP snooping
  4. DSpanning Tree Protocol
8.Hard

A DNS cache poisoning attack aims to:

  1. ASteal Wi-Fi passwords
  2. BOverload a server with traffic so that it stops answering queries
  3. CMake a resolver store a false IP address for a domain
  4. DDelete DNS servers

Answer key

  1. 1. C · A wide area network (WAN)
  2. 2. B · traceroute (tracert on Windows)
  3. 3. A · 7
  4. 4. C · It is the router used for traffic to other networks
  5. 5. C · An IP address together with a port number
  6. 6. D · ::1
  7. 7. D · Spanning Tree Protocol
  8. 8. C · Make a resolver store a false IP address for a domain

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