BGP authentication can prevent illegal routers from establishing neighbors with BGP routers. BGP authentication can be divided into ID5 authentication and Keychain authentication. Which of the followingBGP packets will carryBGPKeychain authentication information?

• A.Open
• B.Notification
• C.Update
• D.Keepalive

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Basic QinQ can choose the outer tag encapsulation method according to the business type.

• A.False
• B.True

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As shown in the figure, there is a packet containing a three-layer label header. Please select the values (decimal) corresponding to the x, and Z fields in the figure.

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Which of the following statements about MUX VLANs are true?

• A.eachSeparate VLANsmust bind aPrincipal VLAN
• B.eachGroup VLANmust bind aPrincipal VLAN
• C.Principal VLANcan andMUX VLAIall withinVLANcommunication
• D.Separate VLANscan andMUX VLANall withinVLANcommunication

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Which of the following statements is false when troubleshooting the dual-active failure of a VRRP backup group?

• A.need to check the interfaceVRRPGroupIDIs it the same
• B.Interface needs to be checkedIPWhether the address is in the same network segment
• C.need to checkVRRPgroup of virtualIPIs the address the same
• D.No need to check deliveryVRRPWhether the switch port of the advertisement message is in the sameVLAN

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