单项选择题
A. It is the size of the RSVP hello packet
B. It is how long it maintains RSVP neighbors
C. It is the length of time between RSVP hello packets
D. It is how long the router waits before declaring a router to be down
多项选择题 What are two purposes of the RSVP signaling protocol when configuring MPLS Label-Switched Paths (LSPs)? （）(Choose two.)
多项选择题 Which three are true about MPLS LSP establishment using RSVP?（） (Choose three.)
单项选择题 What is the term "ordered control" mean regarding how MPLS LSPs are established?（）