资源预留协议（Resource Reservation Protocol，简称RSVP）是一个通过网络进行资源预留的协议，是为实现综合业务网而设计的，其具体可见RFC 2205。RSVP要求接收者在连接创建之初进行资源预留，它必须支持单播和多播数据流，并具有很好的可伸缩性和强壮性。主机或者路由器可以使用RSVP满足不同应用进程数据流所需的不同的服务质量(QoS)。RSVP定义应用进程如何进行资源预留并在预留的资源不用时如何进行预留资源的删除。RSVP将会使得路径上每个节点都进行资源预留。

RSVP本身不是一个路由协议，而是被设计用于互联现在的和将来的路由协议。

The Resource Reservation Protocol (RSVP) is a Transport Layer protocol designed to reserve resources across a network for an integrated services Internet. RSVP operates over an IPv4 or IPv6 Internet Layer and provides receiver-initiated setup of resource reservations for multicast or unicast data flows with scaling and robustness. It does not transport application data but is similar to a control protocol, like Internet Control Message Protocol (ICMP) or Internet Group Management Protocol (IGMP). RSVP is described in RFC 2205.