COMMUNICATION OF DATA IN A NETWORK.Data in a network travels from one computer to the other using laid down rules known as Protocols. The protocols used depend on the way the computers are connected together on the network. Generally, there are 2 broad ways in which computers communicate with one another in a network, namely:
Point-to-point communication.In point-to-point, the network contains numerous cables or telephone lines, each one connecting a pair of computers. The message is received at each intermediate computer in whole, stored there until the required output line is free, and then forwarded. A network using this principle is called a point-to-point or store-and-forward network.
Broadcast communication.In broadcast, there is a single communication channel shared by all computers. In this case, the messages sent by any computer are received by all other computers. Something in the message itself must specify for whom it is intended. After receiving a message not intended for itself, a computer just ignores it.
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