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 simply repeats every incoming signal out of all its other ports?

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

Which IEEE standard family defines wired Ethernet?

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

In networking, what does bandwidth usually refer to?

  1. AThe delay before data arrives
  2. BThe maximum data rate a link can carry
  3. CThe number of hops to a destination
  4. DThe share of packets that are lost
4.Medium

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

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

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

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

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

  1. A192.168.0.0/25
  2. B192.168.0.0/22
  3. C192.168.0.0/23
  4. D192.168.1.0/23
7.Hard

The count-to-infinity problem occurs in which kind of routing protocol, and what helps against it?

  1. APath-vector; longer AS paths
  2. BStatic routing; adding default routes
  3. CDistance-vector; split horizon and poison reverse
  4. DLink-state; flooding link updates
8.Hard

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

  1. AInternet layer
  2. BTransport layer
  3. CLink layer
  4. DApplication layer

Answer key

  1. 1. A · A hub
  2. 2. B · IEEE 802.3
  3. 3. B · The maximum data rate a link can carry
  4. 4. D · The destination MAC address is not yet in its address table
  5. 5. C · To establish a connection and synchronise sequence numbers
  6. 6. C · 192.168.0.0/23
  7. 7. C · Distance-vector; split horizon and poison reverse
  8. 8. B · Transport layer

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