Express Learning: Data Communications and Computer Networks

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Network Security

1. What are the desirable requirements for a secure communication?

Ans: Nowadays, the computer network is used by most people for performing their tasks such as shopping, bill payment and banking. Thus, it becomes important to secure the network, so that unauthorized people could not access the information. For secured communication, there are some basic requirements that must be met. These are as follows:

Confidentiality: It refers to maintaining secrecy of the message being transmitted over the network. Only the sender and the intended receiver should be able to understand and read the message and no eavesdropper should ...