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


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1.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

2.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

4.單項(xiàng)選擇題Which statement about SNMP is true？（）

A.SNMP version 2 uses a proxy agent to forward GetNext message to SNMP version 3.
B.SNMP version 2 supports message integrity to ensure that a packet has not been tampered with
C.Proxy agents were used only in SNMP version 1.
D.SNMP version 3 supports encryption and SNMP version 2 support authentication.
E.GetBulk messages are converted to GetNext messages by the proxy agent and are then forwarded to the SNMP version 1 agent.

5.多項(xiàng)選擇題In relation to MPLS Multicast VPN， which three statements about multicast distribution （MDT） groups aretrue？ （）

A.Default MDT groups are used for PIM control traffic， low-bandwidth sources， and flooding of sparse mode traffic.
B.MDTs are built in customer networks
C.Data MDT groups are used for high-bandwidth sources to reduce replication to uninterested PEs.
D.MDTs are built in provider networks
E.The number of MDTs depends on PIM modes of MDT groups.