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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

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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

單項選擇題

Which of these ports does syslog use to send messages to a syslog server?（）

A.TCP502
B.TCP514
C.TCP520
D.UDP502
E.UDP514
F.UDP520

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