Circuit Switching |
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Communication via circuit switching implies that there is a dedicated communication path between two nodes. Originally Global communication infrastructure (telephone) was based on circuit switched technology where a series of exchanges would establish a direct connection between you and the person you were trying to contact
Communicating via circuit switching involves three phases. 1/ Circuit establishment - before signals can be transmitted, an end to end circuit must be established e.g. in fig 1, node A sends a request to node 5 requesting a connection to node E, node 5 would make a request to node 6 would make a request to node E. 2/ Data transfer - information can now be transmitted from A through the network to E. 3/ Circuit disconnect - After some period of data transfer, the connection is terminated, usually by an action of one of the two stations. Circuit switching was developed to handle voice traffic but is now also used for data traffic. The best know example of a circuit switching network is the public telephone network. | ||
