The bits of data are divided into sections that are each transmitted independently across the network to their destination. Identify the name given to these sections of data.

2(b)Packet Switching RoutingEasy1 mark

A network component is used to control the path taken across the network for each section of data. Identify the name of this network component.

2(c)Data Transmission MethodsMedium6 marks

Data is transmitted across the network using the serial full-duplex data transmission method. Explain three benefits of transmitting the data using the serial full-duplex data transmission method.

Answer

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2(d)Error Detection CorrectionMedium3 marks

A checksum is used to check for errors in the data. A checksum value is calculated from the data before it is transmitted. Describe how this checksum value is used to check for errors in the data after transmission.

Answer

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Context for 2(e)

All data that is transmitted across the network is encrypted before transmission.

2(e)(i)Encryption CiphersEasy2 marks

Give two types of encryption that could be used.

Two answers required.

2(e)(ii)Encryption CiphersEasy2 marks

Describe what is meant by an encryption key.

Answer

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