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 IEEE standard family defines wired Ethernet?

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

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

  1. A192.168.1.255
  2. B255.255.255.0
  3. C192.168.1.0
  4. D192.168.1.1
3.Easy

What is the name of the data unit at the data link layer?

  1. ASegment
  2. BFrame
  3. CMessage
  4. DPacket
4.Medium

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

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

NAT (network address translation) is mainly used to:

  1. AIncrease the speed of a network cable
  2. BLet many devices with private addresses share one public IP address
  3. CEncrypt traffic between two sites
  4. DTranslate domain names into IP addresses for devices on a local network
6.Medium

Why is UDP often preferred for live video calls?

  1. ALow delay matters more than retransmitting every lost packet
  2. BUDP encrypts data automatically
  3. CUDP is required for all video
  4. DUDP guarantees every packet arrives, so the picture never freezes
7.Hard

Why does IPv6 not need NAT for address shortage?

  1. AIts 128-bit address space is large enough to give every device a global address
  2. BIPv6 only works on local networks, so addresses never need to be shared globally
  3. CIPv6 encrypts all addresses
  4. DIPv6 does not use addresses
8.Hard

Hosts in VLAN 10 and VLAN 20 on the same switch cannot communicate. What is needed?

  1. AA router or layer 3 switch to route between the VLANs
  2. BThe same MAC address on both hosts
  3. CA hub connected to both VLANs
  4. DA longer cable between the hosts

Answer key

  1. 1. C · IEEE 802.3
  2. 2. A · 192.168.1.255
  3. 3. B · Frame
  4. 4. C · 192.168.10.64
  5. 5. B · Let many devices with private addresses share one public IP address
  6. 6. A · Low delay matters more than retransmitting every lost packet
  7. 7. A · Its 128-bit address space is large enough to give every device a global address
  8. 8. A · A router or layer 3 switch to route between the VLANs

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