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 device forwards packets between different networks based on IP addresses?

  1. AA repeater
  2. BA switch
  3. CA hub
  4. DA router
2.Easy

What does a packet header mainly contain?

  1. AThe cable type used for the link
  2. BControl information such as source and destination addresses
  3. CThe website's text and images
  4. DThe user's actual file contents, split into equal-sized pieces
3.Easy

In a peer-to-peer network:

  1. ADevices cannot communicate directly
  2. BOne central server handles every request
  3. CEach node can act as both a client and a server
  4. DOnly routers may share files
4.Medium

A signal travels 2000 km through fibre at about 2 × 10⁸ m/s. What is the propagation delay?

  1. A100 ms
  2. B0.1 ms
  3. C1 ms
  4. D10 ms
5.Medium

What does ARP do?

  1. AFinds the MAC address that belongs to an IP address on the local network
  2. BResolves domain names
  3. CRoutes packets on the internet
  4. DAssigns IP addresses automatically to hosts when they join the local network
6.Medium

A browser receives HTTP status code 404. What does it mean?

  1. AThe requested resource was not found
  2. BThe server had an internal error
  3. CThe request succeeded
  4. DThe client must log in first
7.Hard

A remote-terminal application feels sluggish because small keystroke packets are held back. Which TCP mechanism is often responsible?

  1. AThe three-way handshake
  2. BFast retransmit
  3. CSlow start
  4. DNagle's algorithm
8.Hard

Which routing protocol is a link-state protocol?

  1. AOSPF
  2. BARP
  3. CBGP
  4. DRIP

Answer key

  1. 1. D · A router
  2. 2. B · Control information such as source and destination addresses
  3. 3. C · Each node can act as both a client and a server
  4. 4. D · 10 ms
  5. 5. A · Finds the MAC address that belongs to an IP address on the local network
  6. 6. A · The requested resource was not found
  7. 7. D · Nagle's algorithm
  8. 8. A · OSPF

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