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. AHardware that connects a computer to a network
  2. BA server that stores web pages
  3. CA cable that links two routers
  4. DSoftware that resolves domain names
2.Easy

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

  1. Atraceroute (tracert on Windows)
  2. Bnslookup
  3. Cnetstat
  4. Dipconfig
3.Easy

In networking, what does bandwidth usually refer to?

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

Which DNS record type maps a host name to an IPv6 address?

  1. ACNAME
  2. BA
  3. CAAAA
  4. DMX
5.Medium

Which medium access method did classic shared (half-duplex) Ethernet use?

  1. ACSMA/CA
  2. BTDMA
  3. CToken passing
  4. DCSMA/CD
6.Medium

What is the main purpose of a VLAN?

  1. ATo increase the speed of every switch port
  2. BTo encrypt all traffic between switches so other departments cannot read it
  3. CTo split one physical switched network into separate broadcast domains
  4. DTo give each device a public IP address
7.Hard

An 8-port switch (no VLANs) has one host on each port. How many collision domains and broadcast domains are there?

  1. A1 collision domain, 1 broadcast domain
  2. B1 collision domain, 8 broadcast domains
  3. C8 collision domains, 1 broadcast domain
  4. D8 collision domains, 8 broadcast domains
8.Hard

With sliding-window protocols, how does Go-Back-N differ from Selective Repeat after one frame is lost?

  1. ABoth resend the whole window from the start
  2. BGo-Back-N resends the lost frame and all later ones; Selective Repeat only the lost one
  3. CNeither ever resends lost frames
  4. DGo-Back-N resends only the lost frame; Selective Repeat resends that frame and all later ones

Answer key

  1. 1. A · Hardware that connects a computer to a network
  2. 2. A · traceroute (tracert on Windows)
  3. 3. B · The maximum data rate a link can carry
  4. 4. C · AAAA
  5. 5. D · CSMA/CD
  6. 6. C · To split one physical switched network into separate broadcast domains
  7. 7. C · 8 collision domains, 1 broadcast domain
  8. 8. B · Go-Back-N resends the lost frame and all later ones; Selective Repeat only the lost one

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