Which layer 2 protocol encapsulation type supports synchronous and asynchronous circuis and has built-in security mechanisms?() A. Frame RelayB. HDLCC. x.25D. PPP

Which layer 2 protocol encapsulation type supports synchronous and asynchronous circuis and has built-in security mechanisms?()

A. Frame Relay

B. HDLC

C. x.25

D. PPP


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Refer to the exhibit.What is the reason that the interface status is “administratively down,line protocol down”?() A.There is a mismatch in encapsulation typesB.The wrong type of cable is connected to the interfaceC.The interface has been configured with the shutdown commandD.The interface is not receiving any keepalivesE.The interface needs to be configured as a DTE deviceF.There is no encapsulation type configured

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A customer is trying to decide which 802.1X inner protocol to use on their network. The customer requires that nopasswords be sent across the network in plain text, that the protocol be supported by the Windows native supplicant,and that the protocol supports password changes at Layer 2. Which protocol would meet the customers needs?()A、EAP-TLSB、EAP-MD5C、PAPD、EAP-MSCHAPv2

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单选题Refer to the exhibit.What is the reason that the interface status is “administratively down,line protocol down”?()AThere is a mismatch in encapsulation typesBThe wrong type of cable is connected to the interfaceCThe interface has been configured with the shutdown commandDThe interface is not receiving any keepalivesEThe interface needs to be configured as a DTE deviceFThere is no encapsulation type configured

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