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單項(xiàng)選擇題

Which of the following traffic types would a network layer firewall be unable to filter?（）

A.SMTP traffic
B.ICMP messages
C.HTTP traffic
D.Email sender verification

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單項(xiàng)選擇題

One end of a CAT5 cable is punched down following the 568B standard. The other end should beterminated using which standard to make a straight-through cable?（）

A.568B
B.RJ-11
C.RJ-45
D.568A

單項(xiàng)選擇題

Which of the following authentication protocols uses certificates to negotiate access to the network?（）

A.PAP
B.CHAP
C.EAP-TLS
D.Kerberos