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 the URL https://www.example.com/index.html, which part is the host name?

  1. Aindex.html
  2. Bexample.com/index.html
  3. Chttps
  4. Dwww.example.com
2.Easy

In the client-server model:

  1. AClients send requests and a server provides the service
  2. BEvery computer stores the whole internet
  3. CServers send requests and clients answer them
  4. DAll devices must be in the same room
3.Easy

What is throughput?

  1. AThe theoretical maximum rate a link can carry under ideal conditions
  2. BThe number of routers on a path
  3. CThe rate at which data is actually delivered successfully
  4. DThe time a packet takes to cross a link
4.Medium

What is the purpose of the TCP three-way handshake?

  1. ATo close a connection quickly
  2. BTo find the IP address of a host before data can be sent to it
  3. CTo establish a connection and synchronise sequence numbers
  4. DTo encrypt the data
5.Medium

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

  1. AA MAC address alone
  2. BA subnet mask and gateway
  3. CAn IP address together with a port number
  4. DA domain name alone
6.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 increase the speed of every switch port
  4. DTo give each device a public IP address
7.Hard

By Shannon's theorem, what is the capacity of a 1 MHz channel with a signal-to-noise ratio of 255?

  1. A1 Mbit/s
  2. B2 Mbit/s
  3. C8 Mbit/s
  4. D255 Mbit/s
8.Hard

A user can ping 8.8.8.8 but cannot open any website by name. Where is the problem most likely?

  1. AThe network card driver
  2. BThe default gateway
  3. CThe physical cable
  4. DName resolution (DNS)

Answer key

  1. 1. D · www.example.com
  2. 2. A · Clients send requests and a server provides the service
  3. 3. C · The rate at which data is actually delivered successfully
  4. 4. C · To establish a connection and synchronise sequence numbers
  5. 5. C · An IP address together with a port number
  6. 6. A · To split one physical switched network into separate broadcast domains
  7. 7. C · 8 Mbit/s
  8. 8. D · Name resolution (DNS)

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