Chapter 6 - Computer Networks
1.Describe the purpose of a NIC. (2 marks) - ANS-Allow a computer to connect to a network by
sending and receiving electrical signals.
2.Distinguish between a network hub and a network switch. (4 marks) - ANS-A hub sends data
to all connected ports; a switch sends data to specific addresses.
3.Describe three ways in which security can be implemented on a wireless access point.
(3 marks) - ANS-Hide SSID, restrict access to specific MAC addresses, encryption
4.Describe the purpose of a router. (2 marks) - ANS-Directs data packets, to their destinations.
5.What is a network bridge? (2 marks) - ANS-A hardware device that connects two networks.
6.State three different uses for a network server. (3 marks) - ANS-database,games,email
7.Explain the difference between a client-server network and a peer-to-peer network.
(4 marks) - ANS-A client-server network has separate client machines as workstations that
request services and a server to provide services. A peer to peer network doesn't have a server.
Instead, services are carried out by the computers, or 'peers' on network. On a peer to peer
network all computers have equal status, they act as workstations and also all have network
functionality.
8.Explain why bus networks can often be slow. (3 marks) - ANS-Collisions; re-sends often
necessary
9.State two advantages of a star network over a bus network.
(2 marks) - ANS-fewer collisions; faster transmission
10.Explain what is meant by a network protocol. (3 marks) - ANS-Defines rules and standards
for data transmission.
11.Describe two protocols commonly used on the Internet. (4 marks) - ANS-TCP concerned with
connections, POP3 emails
12.What is a data packet? (2 marks) - ANS-A unit of data, sent on a network.
13.What is meant by packet switching?
(3 marks) - ANS-A system for routing packets, across different routes, reassembling them at
destination.
1.Describe the purpose of a NIC. (2 marks) - ANS-Allow a computer to connect to a network by
sending and receiving electrical signals.
2.Distinguish between a network hub and a network switch. (4 marks) - ANS-A hub sends data
to all connected ports; a switch sends data to specific addresses.
3.Describe three ways in which security can be implemented on a wireless access point.
(3 marks) - ANS-Hide SSID, restrict access to specific MAC addresses, encryption
4.Describe the purpose of a router. (2 marks) - ANS-Directs data packets, to their destinations.
5.What is a network bridge? (2 marks) - ANS-A hardware device that connects two networks.
6.State three different uses for a network server. (3 marks) - ANS-database,games,email
7.Explain the difference between a client-server network and a peer-to-peer network.
(4 marks) - ANS-A client-server network has separate client machines as workstations that
request services and a server to provide services. A peer to peer network doesn't have a server.
Instead, services are carried out by the computers, or 'peers' on network. On a peer to peer
network all computers have equal status, they act as workstations and also all have network
functionality.
8.Explain why bus networks can often be slow. (3 marks) - ANS-Collisions; re-sends often
necessary
9.State two advantages of a star network over a bus network.
(2 marks) - ANS-fewer collisions; faster transmission
10.Explain what is meant by a network protocol. (3 marks) - ANS-Defines rules and standards
for data transmission.
11.Describe two protocols commonly used on the Internet. (4 marks) - ANS-TCP concerned with
connections, POP3 emails
12.What is a data packet? (2 marks) - ANS-A unit of data, sent on a network.
13.What is meant by packet switching?
(3 marks) - ANS-A system for routing packets, across different routes, reassembling them at
destination.
