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 a VPN mainly provide?

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

What is the broadcast address of the network 192.168.1.0/24?

  1. A192.168.1.0
  2. B192.168.1.1
  3. C255.255.255.0
  4. D192.168.1.255
3.Easy

Which IEEE standard family defines wired Ethernet?

  1. AIEEE 802.11
  2. BIEEE 802.5
  3. CIEEE 802.16
  4. DIEEE 802.3
4.Medium

What is the main difference between the HTTP methods GET and POST?

  1. AGET uses UDP, POST uses TCP
  2. BGET deletes a resource, POST reads it from the server's database
  3. CGET retrieves a resource, POST submits data in the request body
  4. DGET is encrypted, POST is not
5.Medium

What is the purpose of the TCP three-way handshake?

  1. ATo encrypt the data
  2. BTo establish a connection and synchronise sequence numbers
  3. CTo find the IP address of a host before data can be sent to it
  4. DTo close a connection quickly
6.Medium

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

  1. A1 ms
  2. B8 ms
  3. C0.125 ms
  4. D12 ms
7.Hard

How does fragmentation differ in IPv6 compared with IPv4?

  1. ARouters never fragment IPv6 packets; only the source can, using path MTU discovery
  2. BIPv6 does not allow packets larger than 576 bytes
  3. CIPv6 routers fragment every packet larger than 64 bytes before forwarding it on the path
  4. DIPv6 fragments at the transport layer inside TCP
8.Hard

An 8-port switch (no VLANs) has one host on each port. How many collision domains and broadcast domains are there?

  1. A8 collision domains, 1 broadcast domain
  2. B8 collision domains, 8 broadcast domains
  3. C1 collision domain, 1 broadcast domain
  4. D1 collision domain, 8 broadcast domains

Answer key

  1. 1. B · An encrypted tunnel across an untrusted network such as the internet
  2. 2. D · 192.168.1.255
  3. 3. D · IEEE 802.3
  4. 4. C · GET retrieves a resource, POST submits data in the request body
  5. 5. B · To establish a connection and synchronise sequence numbers
  6. 6. A · 1 ms
  7. 7. A · Routers never fragment IPv6 packets; only the source can, using path MTU discovery
  8. 8. A · 8 collision domains, 1 broadcast domain

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