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多項選擇題

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

A.ASM
B.BiDirPIM
C.PIM-SMRP
D.RP-Switchover
E.SourceSpecificMulticast

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單項選擇題

What is the default value of the SPT threshold in Cisco routers?（）

A. 0
B. 1
C. 2
D. 4
E. 16
F. infinity

單項選擇題

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

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