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In the alert protocol the first byte takes the value 1 or 2 which corresponds to ________ and _________ respectively.

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In the alert protocol the first byte takes the value 1 or 2 which corresponds to ________ and _________ respectively.

(a) Select, Alarm

(b) Alert, Alarm

(c) Warning, Alarm

(d) Warning, Fatal

This question was addressed to me in an interview.

My question is taken from Overview in chapter Wireless Network Security and Network Security Overview of Cryptograph & Network Security

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The correct choice is (d) Warning, Fatal

For explanation: The first byte takes the value warning(1) or fatal(2) to convey the severity of the message.

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