多项选择题
A. Within an AS, all routers must run either BGP or IBGP.
B. An AS uses exterior gatew ay protocols (EGPs) to exchange information with other autonomous systems.
C. An AS is a group of routers under the same technical administration.
D. Within an AS, routes learned through BGP can be redistributed using interior gateway protocols.
E. Wi thin an AS, routes learned through an interior protocol cannot be redistributed using BGP to other autonomous systems.
多项选择题 Which three conditions can cause BGP n eighbor establishment to fail?（）
单项选择题 Which command displays the IBGP and EBGP neighbors that are configured?（）
单项选择题 When the BGP path selection process is being performed on a Cisco router, which BGP attribute is used first when determining the best path?（）