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.

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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.

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Answer explanation

IP address

MAC address

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

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Describe how encryption secures data.

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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.

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Write down the differences of Hub and Switch.

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The rules that specify how data is transmitted.

• Protocols
• Parallels
• Bandwidth
• Mulitiplexers

The data transfer rate of a network.

• Bandwidth
• Broadband
• Capacity
• Topology