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 does "latency" mean in networking?

  1. AThe delay for data to travel from source to destination
  2. BThe error rate of a cable
  3. CThe number of devices on a network
  4. DThe maximum amount of data per second that a link can carry
2.Easy

Which protocol is used to send email between mail servers?

  1. ASNMP
  2. BSMTP
  3. CPOP3
  4. DIMAP
3.Easy

In networking, a protocol is:

  1. AA physical cable between two devices
  2. BA set of rules for the format and order of messages
  3. CA list of all devices on a network
  4. DA program that blocks viruses
4.Medium

What is the IPv6 loopback address?

  1. A::1
  2. Bfe80::1
  3. Cff02::1
  4. D::
5.Medium

How long does it take to put a 1500-byte packet onto a 12 Mbit/s link (transmission delay)?

  1. A8 ms
  2. B12 ms
  3. C0.125 ms
  4. D1 ms
6.Medium

Which protocol does the "ping" command use?

  1. AICMP
  2. BTCP
  3. CHTTP
  4. DUDP
7.Hard

A server's private key is stolen a year from now. Which TLS property keeps today's recorded sessions safe?

  1. ASending the certificate twice
  2. BForward secrecy from ephemeral Diffie-Hellman key exchange
  3. CUsing a longer domain name
  4. DCompressing the data before encryption
8.Hard

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

  1. ALink-state; flooding link updates
  2. BStatic routing; adding default routes
  3. CPath-vector; longer AS paths
  4. DDistance-vector; split horizon and poison reverse

Answer key

  1. 1. A · The delay for data to travel from source to destination
  2. 2. B · SMTP
  3. 3. B · A set of rules for the format and order of messages
  4. 4. A · ::1
  5. 5. D · 1 ms
  6. 6. A · ICMP
  7. 7. B · Forward secrecy from ephemeral Diffie-Hellman key exchange
  8. 8. D · Distance-vector; split horizon and poison reverse

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