多项选择题
A. Assign 128-bit router id.
B. Enable a routing instance.
C. Assign IPv6 addresses to interfaces.
D. Add IPv6 family support to interfaces.
E. Enable IPv6-capable routing protocol.
多项选择题 Which three RP election mechanisms are available in a PIM-SM domain?（）
单项选择题 Routers A and B are connected with a point-to-point OC-3 interface. Each routers OC-3 interface is configured for both Level 1 and Level 2. The routers are configured in different areas. How many IS-IS adjacencies exist between the two routers?（）
多项选择题 What are two attributes of the Extended IS-Reachability TLV 22?（）