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

What is a network interface card (NIC)?

  1. AA cable that links two routers
  2. BSoftware that resolves domain names
  3. CHardware that connects a computer to a network
  4. DA server that stores web pages
2.Easy

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

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

Which IEEE standard family defines wired Ethernet?

  1. AIEEE 802.5
  2. BIEEE 802.3
  3. CIEEE 802.16
  4. DIEEE 802.11
4.Medium

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

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

Which metric does RIP use to choose routes?

  1. AHop count
  2. BBusiness policy
  3. CLink bandwidth
  4. DMeasured delay
6.Medium

Why does a switch sometimes send a frame out of all ports except the one it came in on?

  1. AThe frame has a wrong IP checksum and must be checked by every host
  2. BThe switch is acting as a router
  3. CThe destination MAC address is not yet in its address table
  4. DThe frame is too large for one port
7.Hard

In the TCP/IP model, which layer adds port numbers?

  1. AApplication layer
  2. BTransport layer
  3. CInternet layer
  4. DLink layer
8.Hard

A TCP connection has a 64 KB window and a 100 ms round-trip time, and no window scaling. What is its approximate maximum throughput?

  1. AAbout 0.5 Mbit/s
  2. BAbout 50 Mbit/s
  3. CAbout 640 Mbit/s
  4. DAbout 5 Mbit/s

Answer key

  1. 1. C · Hardware that connects a computer to a network
  2. 2. D · A wide area network (WAN)
  3. 3. B · IEEE 802.3
  4. 4. D · To establish a connection and synchronise sequence numbers
  5. 5. A · Hop count
  6. 6. C · The destination MAC address is not yet in its address table
  7. 7. B · Transport layer
  8. 8. D · About 5 Mbit/s

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