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

In networking, a protocol is:

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

Which IEEE standard family defines wired Ethernet?

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

A MAC address identifies:

  1. AA website
  2. BA user account
  3. CA router's public IP
  4. DA network interface on the local link
4.Medium

What is the IPv6 loopback address?

  1. Aff02::1
  2. Bfe80::1
  3. C::
  4. D::1
5.Medium

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

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

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

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

What is the main benefit of persistent connections (keep-alive) in HTTP/1.1?

  1. AResponses can arrive in any order on one stream, so slow replies do not block others
  2. BSeveral requests reuse one TCP connection, avoiding repeated handshakes
  3. CThe connection stays encrypted without TLS
  4. DThe server can push updates over UDP
8.Hard

In a TCP connection, what does the receive window (rwnd) control?

  1. AThe retransmission time-out, calculated from the measured round-trip time of each segment
  2. BHow much unacknowledged data the sender may send, based on the receiver's buffer
  3. CThe number of open ports
  4. DThe size of each IP packet header

Answer key

  1. 1. C · A set of rules for the format and order of messages
  2. 2. A · IEEE 802.3
  3. 3. D · A network interface on the local link
  4. 4. D · ::1
  5. 5. B · 192.168.10.64
  6. 6. D · To establish a connection and synchronise sequence numbers
  7. 7. B · Several requests reuse one TCP connection, avoiding repeated handshakes
  8. 8. B · How much unacknowledged data the sender may send, based on the receiver's buffer

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