多项选择题
Which two conditions, when met, allow an IS-IS Level 2 router to be considered attached?（）
A. You can reach other Level 2 routers.
B. It can reach at least one other defined area.
C. The router is reachable by at least two ES-IS nodes.
D. It has at least one enabled reachable prefix with a valid metric defined.
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Which two are characteristics of both Kompella and Martini-based VPNs? （）
A. label stacking
B. auto-provisioning
C. circuit status vector
D. Martini Encapsulation
E. LDP-based control plane -
单项选择题
Which extension to the OSPFv2 protocol supports traffic engineering?（）
A. LSA Type 8
B. LSA Type 9
C. LSA Type 10
D. Transparent LSA -
单项选择题
By default, to which peers will a BGP router advertise routes learned from IBGP peers?（）
A. all BGP peers
B. all IBGP peers
C. all EBGP peers
D. all MBGP peers
