Source Routing

Posted by AJ × 04:36

* In source routing, path to the destination is determined by the source.

* Source routing works in either datagram or virtual-circuit packet switching.

* Before sending packet, the source has to know the path to the destination in order to include the path information in the packet header.

* The path information contains the sequence of nodes to traverse and should give sufficient information to intermediate node to forward the packet.

* The below fig. shows how source routing works in datagram network.

* Intermediate switch reads header and removes the address identifying the node and forwards the packets to next node.

* Source host selects path that is to be followed by a packet

* Strict: Here, the source specifies the address of each node along the path to the destination.

* Loose: When source knows partial information of network topology, the source can use loose source routing.

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