多項(xiàng)選擇題Which two of these multicast deployments are most susceptible to attacks from unknown sources？（）

A. ASM
B. BiDir PIM
C. PIM-SM RP
D. RP-Switchover
E. Source Specific Multicast


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1.單項(xiàng)選擇題What is the default value of the SPT threshold in Cisco routers？（）

A. 0
B. 1
C. 2
D. 4
E. 16
F. infinity

2.多項(xiàng)選擇題

Refer to the exhibit. Which two statements are correct regarding the creation of a multicas tdistribution tree？ （）

A. Each router determines where to send the JOIN request.
B. The tree will be built based on the IP address of the E2 interface on router E
C. The best path to the source will be discovered in the unicast routing table on router B
D. The best path to the source will be discovered in the unicast routing table on router C
E. The best path to the source will be discovered in the unicast routing table on router E

3.單項(xiàng)選擇題To which of these does IP multicast send packets？（）

A. a single host
B. a subset of hosts
C. all hosts sequentially
D. all hosts simultaneously

4.單項(xiàng)選擇題Which of these ports does syslog use to send messages to a syslog server？（）

A. TCP 502
B. TCP 514
C. TCP 520
D. UDP 502
E. UDP 514
F. UDP 520

5.單項(xiàng)選擇題Which of these is a benefit of ESM？（）

A. supports multiple MIBs
B. includes NetFlow， NBAR， and IP SLA software subsystems
C. includes NetFlow， syslog， and IP SLA software subsystems
D. includes a predefined framework for filtering and correlating messages
E. supports two logging processes so output can be sent in standard and ESM format