Networks questions

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Networks question collection

Review Networks questions for Computer Science, with correct answers shown and coverage across LANs and WANs; network hardware; protocols and addresses.

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Question 1

What is a network protocol?
  1. Agreed rules for communication
  2. A unique address for hardware
  3. A route between two networks
  4. A filter for incoming packets

Question 2

What is TCP/IP?
  1. The main internet protocol suite
  2. A Wi-Fi encryption standard
  3. A web-page transfer protocol
  4. A domain-name lookup service

Question 3

What does an IP address identify?
  1. A device's network location
  2. A network interface's manufacturer
  3. A website's human-readable name
  4. A program's communication port

Question 4

What is a MAC address?
  1. A hardware address for a network interface
  2. A logical address assigned by DHCP
  3. A domain name resolved by DNS
  4. A password used for Wi-Fi access

Question 5

What happens to data in packet switching?
  1. It is split into independently routed packets
  2. It reserves one route for a continuous stream
  3. It is stored until every router is idle
  4. It is converted into one fixed-size signal

Question 6

What is a router's main role?
  1. Forward packets between networks
  2. Forward frames within one LAN
  3. Translate domain names into addresses
  4. Assign addresses to local devices

Question 7

What is the role of a switch on a LAN?
  1. Connects devices on a LAN
  2. Connects only to the internet backbone
  3. Encrypts all network data
  4. Assigns domain names

Question 8

What does DNS do?
  1. Converts domain names to IP addresses
  2. Assigns private keys to users
  3. Measures network latency
  4. Compresses web pages

Question 9

What does DHCP do?
  1. Automatically assigns IP configuration
  2. Maps domain names to IP addresses
  3. Forwards packets between networks
  4. Encrypts traffic between web browsers

Question 10

What security does HTTPS add to HTTP?
  1. Encryption of data in transit
  2. Encryption of every stored web file
  3. Authentication of every website visitor
  4. Removal of all network delay

Question 11

What is bandwidth?
  1. Maximum data transfer rate
  2. Time delay for one packet
  3. Distance between routers
  4. Number of users online

Question 12

What is latency?
  1. Delay in data transmission
  2. Maximum transfer speed
  3. Packet size in bytes
  4. Number of packets sent

Question 13

Which is a wireless transmission medium?
  1. Radio waves
  2. Fibre optic cable
  3. Twisted copper pair
  4. Coaxial cable

Question 14

How do fibre optic cables carry data?
  1. Light pulses
  2. Electrical pulses
  3. Magnetic pulses
  4. Sound waves

Question 15

In a bus topology, what do devices share?
  1. One main backbone cable
  2. A central switch
  3. A ring-only path
  4. Independent direct links to every node

Question 16

In a star topology, what do devices connect to?
  1. A central device
  2. A single shared bus cable
  3. Two parallel rings
  4. Peer-to-peer links

Question 17

What does PAN stand for?
  1. Personal Area Network
  2. Public Access Network
  3. Primary Access Node
  4. Private Address Number

Question 18

What does a VPN provide?
  1. An encrypted tunnel over a public network
  2. A private cable between every device
  3. A permanent public IP address
  4. A filter for all local network traffic

Question 19

What does using WPA2/WPA3 on Wi-Fi do?
  1. Encrypts wireless traffic
  2. Increases hard disk capacity
  3. Assigns MAC addresses
  4. Removes all packet loss

Question 20

What does CDN stand for?
  1. Content Delivery Network
  2. Central Data Node
  3. Connected Domain Network
  4. Content Distribution Node

Question 21

What does packet loss mean?
  1. Some packets do not reach their destination
  2. All packets arrive in order
  3. Bandwidth has increased
  4. DNS has changed the domain name

Question 22

What does a ping test check?
  1. Network reachability and delay
  2. Hard drive read speed
  3. CPU cache size
  4. Screen resolution

Question 23

What is a LAN?
  1. A network covering one local site
  2. A network spanning distant regions
  3. A network around one person's devices
  4. A service distributing web content globally

Question 24

What is a WAN?
  1. A network spanning distant geographical areas
  2. A network confined to one local site
  3. A network around one person's devices
  4. A tunnel through one public network

Question 25

How many bits are in an IPv4 address?
  1. 32
  2. 16
  3. 48
  4. 128

Question 26

What is packet switching?
  1. Sending packets that may take different routes
  2. Sending data as one continuous signal
  3. Giving every packet the same route
  4. Encrypting a password before sending it

Question 27

What characterises a client-server network?
  1. Dedicated servers provide central services
  2. Every device has equal responsibility
  3. Each device connects without shared services
  4. One backbone cable stores all files

Question 28

Which protocol secures an HTTPS connection?
  1. TLS
  2. DNS
  3. DHCP
  4. FTP

Question 29

What happens if a star network's central switch fails?
  1. Connected devices lose network communication
  2. Only one outer device disconnects
  3. Traffic automatically moves to a backbone cable
  4. Every device forms a direct link to every other

Question 30

What is a network interface card used for?
  1. Allowing a device to communicate over a network
  2. Allowing a device to display graphics on a monitor
  3. Allowing a device to store files permanently
  4. Allowing a device to cool its processor

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Review Networks questions for Computer Science, with correct answers shown and coverage across LANs and WANs; network hardware; protocols and addresses.

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