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單項選擇題

Which of the following would be BEST to use when identifying HTTP traffic running on TCP port53?（）

A. Network layer firewall
B. Stateful inspection firewall
C. Zone aware firewall
D. Application layer firewall

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單項選擇題

A Stateful firewall is MOST useful in protecting against which of the following network scans?（）

A.PING
B.UDP
C.Xmas
D.ACK

多項選擇題

By default, which of the following ports would a network need to have opened to allow for thetransmission of incoming and outgoing email?（） (Select TWO).

A.21
B.25
C.80
D.110
E.123

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