单项选择题

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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多项选择题

You are required to configure a SCREEN option that enables IP source route option detection. Which two configurations meet this requirement？（）

A.A
B.B
C.C
D.D

单项选择题

You must configure a SCREEN option that would protect your device from a session table flood.Which configuration meets this requirement？（）

A.A
B.B
C.C
D.D

单项选择题

Prior to applying SCREEN options to drop traffic， you want to determine how your configuration will affect traffic. Which mechanism would you configure to achieve this objective？（）

A.the log option for the particular SCREEN option
B.the permit option for the particular SCREEN option
C.the SCREEN option， because it does not drop traffic by default
D.the alarm-without-drop option for the particular SCREEN option