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單項選擇題

A network engineer wants to allow a temporary entry for a remote user with a specific usename and password so that the user can access the entire network over the internet.which ACL can be used?（）

A. reflexive
B. extended
C. standard
D. dynamic

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單項選擇題

Which term describes a spanning-tree network that has all switch ports in either the blocking or forwarding state?（）

A. redundant
B. spanned
C. provisioned
D. converged

單項選擇題

Which PPP subprotocol negotiates authentication options?（）

A. NCP
B. LCP
C. ISDN
D. DLCI
E. SLIP