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單項選擇題

Before a Diffie-Hellman exchange may begin， the two parties involved must agree on what？（）

A.Two secret keys
B.Two nonsecret keys
C.Two secret numbers
D.Two nonsecret numbers

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單項選擇題

Based on the username global configuration mode command displayed in the exhibit. What does the optionsecret 5 indicate about the enable secret password？（）

A.It is hashed using MD5
B.It is encrypted using a proprietary Cisco encryption algorithm
C.It is hashed using SHA
D.It is encrypted using DH group 5

單項選擇題

Which kind of table will be used by most firewalls today to keep track of the connections through thefirewall？（）

A.reflexive ACL
B.dynamic ACL
C.queuing
D.netflow
E.state