单项选择题
How is an RSVP resv message sent back to the ingress router?（）
A. reverse path of the RRO B. least cost to the ingress router C. shortest path to the egress router D. reverse path of the path vector TLV
单项选择题 The traffic engineering extensions to RSVP provide what functionality?（）
单项选择题 What is the purpose of the RSVP hello interval?（）
多项选择题 What are two purposes of the RSVP signaling protocol when configuring MPLS Label-Switched Paths (LSPs)? （）(Choose two.)
