What is RSVP? How it works? - Networking

What is RSVP? How it works?

RSVP allocates resources for signaling messages which traverse the network. RSVP is receiver-initiated. In the scenarios of multicast, the PATH message is sent out by application server to multiple receiving computers, so that network bandwidth is conserved. The multiple messages received from receivers are merged by RSVP messages by using the values requested which are maximum. This process takes place when the multicast traffic flows. RSVP is a protocol that is soft-state. It means the reservation must be refreshed periodically or it will expire. The reservation information is called as state. The state is cached in every hop tasked by managing resources. Reservations time out and are dropped, in the situation where the refresh messages are not received.
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