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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Name: ____________________   Date: ____________

1.Easy

Which protocol lets an email client read mail while keeping messages and folders on the server?

  1. AIMAP
  2. BSNMP
  3. CSMTP
  4. DDHCP
2.Easy

Which protocol is used to send email between mail servers?

  1. ASMTP
  2. BPOP3
  3. CSNMP
  4. DIMAP
3.Easy

Which protocol automatically gives devices an IP address on a local network?

  1. ASMTP
  2. BDHCP
  3. CDNS
  4. DFTP
4.Medium

Using even parity, which parity bit is added to the data bits 1011001?

  1. A2
  2. B0
  3. C4
  4. D1
5.Medium

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

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

How many usable host addresses does a /24 IPv4 network have?

  1. A255
  2. B252
  3. C256
  4. D254
7.Hard

A path has 100 Mbit/s bandwidth and a 40 ms round-trip time. How much data must be in flight to keep it fully used?

  1. A2.5 MB
  2. B50 kB
  3. C500 kB
  4. D4 kB
8.Hard

A DNS cache poisoning attack aims to:

  1. ASteal Wi-Fi passwords
  2. BMake a resolver store a false IP address for a domain
  3. CDelete DNS servers
  4. DOverload a server with traffic so that it stops answering queries

Answer key

  1. 1. A · IMAP
  2. 2. A · SMTP
  3. 3. B · DHCP
  4. 4. B · 0
  5. 5. C · The destination MAC address is not yet in its address table
  6. 6. D · 254
  7. 7. C · 500 kB
  8. 8. B · Make a resolver store a false IP address for a domain

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