Which three NLRIs can MBGP carry? （）

多项选择题Which three pre-conditions must be met before an OSPF router can perform graceful restart? （）

A. Router must be an ABR.
B. Router must contain one sham link.
C. The network topology must be stable.
D. Router must be able to forward packets.
E. Neighbors must support graceful restart.

单项选择题Which Behavior Aggregate (BA) is used to classify traffic arriving on an LSP?（）

A. EXP
B. DSCP
C. 802.1P
D. inet-precedence

单项选择题Which mechanism does External BGP use to prevent the formation of routing loops?（）

A. AS path
B. Split horizon
C. Poison reverse
D. Unicast RPF check

单项选择题By default, which JUNOS software routing table contains IPv6 unicast routes?（）

A.inet.6
B.ipv6.0
C.inet0
D.inet6.0

单项选择题What is the purpose of IS-IS level boundaries?（）

A. Restrain the formation of adjacencies.
B. Control the flooding scope of link-state PDUs.
C. Partition the L2 backbone into multiple domains.
D. Aggregate L1 domains into a contiguous backbone.