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 application protocol transfers files using separate control and data connections?

  1. ASMTP
  2. BFTP
  3. CHTTP
  4. DDNS
2.Easy

What does a VPN mainly provide?

  1. AAn encrypted tunnel across an untrusted network such as the internet
  2. BAutomatic backup of files to a server
  3. CA faster physical connection to the internet through a dedicated line
  4. DA free public IP address for every device
3.Easy

How many layers does the OSI reference model have?

  1. A9
  2. B5
  3. C7
  4. D4
4.Medium

Which protocol does the "ping" command use?

  1. AICMP
  2. BUDP
  3. CHTTP
  4. DTCP
5.Medium

What is the network address of the host 192.168.10.77/26?

  1. A192.168.10.0
  2. B192.168.10.128
  3. C192.168.10.64
  4. D192.168.10.76
6.Medium

NAT (network address translation) is mainly used to:

  1. AEncrypt traffic between two sites
  2. BLet many devices with private addresses share one public IP address
  3. CTranslate domain names into IP addresses for devices on a local network
  4. DIncrease the speed of a network cable
7.Hard

A firewall blocks all ICMP. Small web requests work, but large downloads over some paths hang. What is the likely cause?

  1. ATCP cannot open connections without ICMP
  2. BDNS needs ICMP to resolve names
  3. CTLS certificates are sent over ICMP
  4. DPath MTU discovery fails because "fragmentation needed" messages are blocked
8.Hard

Which routing protocol is a link-state protocol?

  1. AARP
  2. BBGP
  3. COSPF
  4. DRIP

Answer key

  1. 1. B · FTP
  2. 2. A · An encrypted tunnel across an untrusted network such as the internet
  3. 3. C · 7
  4. 4. A · ICMP
  5. 5. C · 192.168.10.64
  6. 6. B · Let many devices with private addresses share one public IP address
  7. 7. D · Path MTU discovery fails because "fragmentation needed" messages are blocked
  8. 8. C · OSPF

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