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?（）
A. EXP bits B. VPI / VCI C. shim header D. SNAP header
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?（）
单项选择题 With MPLS Fast Reroute, what is the "point of local repair"?（）
单项选择题 What is true about a Bypass Tunnel in MPLS Fast Reroute?（）
