Network (IGCSE)

Which one of these connects a LAN to a WAN?

• Switch

• Gateway

• Modem

• Server

Explain why public key encryption is more secure than symmetric key

encryption.

Answer explanation

Public key encryption uses longer keys than does symmetric encryption.

The private key is never distributed.

......................... controls the traffic entering a network.

State two methods which used to identify the devices on the network.

Answer explanation

IP address

MAC address

State the reason why a booster is used in a network.

Describe how encryption secures data.

Answer explanation

Encryption takes plain text, and scrambles it into an mathematical algorithms and digital keys — called “cipher text.

Identify the differences between peer to peer and client-server network.

Write down the differences of Hub and Switch.

The rules that specify how data is transmitted.

• Protocols
• Parallels
• Bandwidth
• Mulitiplexers

The data transfer rate of a network.

• Bandwidth
• Broadband
• Capacity
• Topology