Usually routing is performed at the routing device ( network routing ) , to send the packet to a destination based on various routing decisions & routing protocols .
Where as in Source routing the sender would mention the route the packet must take to reach the destination . The router present in the network path, will simply forward the packet based on the routing path mentioned.
We have two types of source routing techniques .
- Strict source routing
- Loose source record route (LSRR)
In strict source routing , the sender determines the exact route the packet must follow to reach the destination . This type of source routing is generally not employed .
In LSSR , the sender would mention one or more hops the packet must go through to reach the destination .
The main usages of source routing techniques are for
- performance improvement
- trouble shooting.
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