多项选择题
A. LDP uses Down Stream On Demand.
B. RSVP uses Down Stream On Demand.
C. LDP uses Down Stream Unsolicited.
D. RSVP uses Down Stream Unsolicited.
单项选择题 Which device is responsible for assigning label values in an MPLS network?（）
单项选择题 An ERX Edge Router is operating in an MPLS network using interface label space.What is used to make a forwarding decision?（）
单项选择题 A router receives a packet from a neighbor with an MPLS shim header value of 0.What does the router do with this packet?（）