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

What does LAN stand for?

  1. ALinked application node
  2. BLarge access network
  3. CLogical address number
  4. DLocal area network
2.Easy

How many layers does the OSI reference model have?

  1. A7
  2. B5
  3. C9
  4. D4
3.Easy

In the URL https://www.example.com/index.html, which part is the host name?

  1. Awww.example.com
  2. Bhttps
  3. Cindex.html
  4. Dexample.com/index.html
4.Medium

What is the role of a default gateway on a host?

  1. AIt is the DNS server
  2. BIt is the switch port the host is connected to
  3. CIt assigns MAC addresses
  4. DIt is the router used for traffic to other networks
5.Medium

Which metric does RIP use to choose routes?

  1. ABusiness policy
  2. BMeasured delay
  3. CLink bandwidth
  4. DHop count
6.Medium

What does an MX record in DNS specify?

  1. AThe mail servers that accept email for a domain
  2. BThe name servers for a zone
  3. CAn alias name for another host
  4. DThe IPv4 address of a web server
7.Hard

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

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

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

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

Answer key

  1. 1. D · Local area network
  2. 2. A · 7
  3. 3. A · www.example.com
  4. 4. D · It is the router used for traffic to other networks
  5. 5. D · Hop count
  6. 6. A · The mail servers that accept email for a domain
  7. 7. D · Distance-vector; split horizon and poison reverse
  8. 8. D · Path MTU discovery fails because "fragmentation needed" messages are blocked

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