單項(xiàng)選擇題

What is the Cisco IOS default behavior for switching from the shared tree to the shortest path tree in PIM-SM operations?()

A.immediately after receiving the first packet on the shared tree for a given (S,G)
B.after receiving over 1 kb/s traffic onthe shared tree for a given (S,G)
C.10 seconds after receiving the first packet on the shared tree for a given (S,G)
D.30 seconds after receiving the first packet on the shared tree for a given (S,G)
E.after receiving over 10 kb/s traffic onthe shared tree for a given (S,G)

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