單項(xiàng)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


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1.多項(xiàng)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.

2.多項(xiàng)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

3.多項(xiàng)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

4.單項(xiàng)選擇題In PIM-SM operations，to which device does the first router that connects with the multicast source sendthe register message？（）

A.RP
B.multicast source
C.IGMP router
D.multicast receiver
E.PIM designated router

5.單項(xiàng)選擇題What are the default values for GRE tunnel keeplive time and number of retries？（）

A.5 seconds and 3 retries
B.10 seconds and 5 retries
C.10 seconds and 3 retries
D.20 seconds and 5 retries
E.5 seconds and 5 retries