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 OSI layer transmits raw bits as electrical, optical or radio signals?

  1. AData link layer
  2. BPhysical layer
  3. CNetwork layer
  4. DSession layer
2.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. CSoftware that resolves domain names
  4. DA cable that links two routers
3.Easy

Which protocol gives secure, encrypted remote login to another computer?

  1. ATelnet
  2. BSSH
  3. CSNMP
  4. DFTP
4.Medium

TLS provides which security properties for HTTPS?

  1. AOnly faster loading
  2. BAnonymity of the user
  3. CConfidentiality, integrity and server authentication
  4. DProtection against all malware and phishing on the visited site
5.Medium

Which range of TCP/UDP port numbers is reserved as "well-known" ports?

  1. A0–65535
  2. B49152–65535
  3. C1024–49151
  4. D0–1023
6.Medium

Which metric does RIP use to choose routes?

  1. ABusiness policy
  2. BHop count
  3. CLink bandwidth
  4. DMeasured delay
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. BUsing a longer domain name
  3. CCompressing the data before encryption
  4. DForward secrecy from ephemeral Diffie-Hellman key exchange
8.Hard

Which mechanism prevents broadcast loops in a network with redundant switch links?

  1. AARP caching
  2. BNAT
  3. CSpanning Tree Protocol
  4. DDHCP snooping

Answer key

  1. 1. B · Physical layer
  2. 2. A · Hardware that connects a computer to a network
  3. 3. B · SSH
  4. 4. C · Confidentiality, integrity and server authentication
  5. 5. D · 0–1023
  6. 6. B · Hop count
  7. 7. D · Forward secrecy from ephemeral Diffie-Hellman key exchange
  8. 8. C · Spanning Tree Protocol

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