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單項(xiàng)選擇題

Which parameters are valid SCREEN options for combating operating system probes?()

A.syn-fin, syn-flood, and tcp-no-frag
B.syn-fin, port-scan, and tcp-no-flag
C.syn-fin, fin-no-ack, and tcp-no-frag
D.syn-fin, syn-ack-ack-proxy, and tcp-no-frag

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