单项选择题

PE1 has connections to VPN sites that are served by three remote PE routers. How many LSPs must be established to support 2547bis?（）

A. an LSP for each local CE device
B. an LSP for each remote PE device
C. an LSP for each remote CE device
D. an LSP for each CE facing interface

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单项选择题

Which command clears the history of BGP damped routes?（）

A. clear bgp damping
B. clear bgp neighbor
C. clear bgp neighbor damp
D. clear protocol bgp damp

单项选择题

Which well-known community prevents a BGP speaker from announcing the associated prefix to itsinternal peers?（）

A. no-export
B. no-advertise
C. no-readvertise
D. no-export-subconfed

单项选择题

What is the function of the helper router during a restart event in OSPF?（）

A. Sends Rapid Hellos to the restarting router.
B. Maintains Adjancency with restarting router.
C. Sends periodic DD packets to the restarting router.
D. Floods Type 9 LSAs to all routers indicating a restarting event.