單項選擇題Which statement about the Cisco MPLS TE Fast Reroute （FRR） node protection operation is not correct？（）

A.It requires a next-next hop backup tunnel.
B.Point of local repair （PLR） swaps the next hop label and pushes the backup label.
C.The backup tunnel terminates on the merge point （MP） where traffic rejoins the primary tunnel.
D.The backup tunnel can have associated bandwidth capacity.
E.Restoration time is expected under 50 ms.


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1.單項選擇題Where are MPLS point-to-multipoint traffic engineering packets replicated？（）

A.head-end router
B.branch-point router
C.midpoint router
D.leaf-point router
E.tail-end router

2.多項選擇題Which three statements about BGP confederation and route reflectors are true？ （）

A.Clusters are used in confederation schemes to avoid loops.
B.BGP network can have a confederation within a route reflector area.
C.An internal BGP network cannot have a route reflector within a confederation.
D.An internal BGP network can have a route reflector within a confederation.
E.Clusters are used in route reflector schemes to avoid loops.
F.BGP network cannot have a confederation within a route reflector area.

3.多項選擇題Which two statements about NTP version 4 are true？（）

A.It supports fast synchronization at starting and before network failures
B.It supports automatic server discovery
C.It uses a fixed-point arithmetion
D.It supports the "nanokernel" kernel implementation
E.It does not support Public-Key Cryptography

4.多項選擇題Process-level redundancy is implemented by a system manager process that creates the standby process.What two functions are provided by the system-level process called Qnet Symlink Manager （QSM）？（）

A.backing up the information for the broken connections
B.provides common information for connecting processes and services
C.detection of a failed connection
D.provides an abstract name for a process or service
E.distribution of symbolic link information