PACKET AND CIRCUIT-SWITCHED DATA TRANSFER

In any kind of network the information can travel using either packet-switched (PS) or circuit-switched (CS) mode.
In general, circuit-switched mode is better for a connection set up for the purpose of a constant information flow.
A dedicated resource for this purpose is allocated throughout the connection.
Packet-switched mode is better for “bursty” connections in which short amounts of data are exchanged between the users over long time periods or for infrequent transmissions of big data volumes.
In this case no physical resources are dedicated for the purpose of the connection.
In principle, every burst of data will be routed separately within the network.
it takes to send each packet
A channel can serve many users
User pays by the pacIn circuit-switching, resources (e.g. a channel) are allocated to user for duration of connection
Inefficient use of resources
User pays for the whole connection
High QoS: channel maintains real-time connection
In packet-switching, resources are allocated to user only for the time ket
Ideal for bursty data connections