Which of the following command is to configure VRRP to track the state of the physical interface?

• A.vrrp vrid 1 interface Gigabitethernet0/0/0 track
• B.vrrp vrid 1 interface Gigabitethernet0/0/0
• C.vrrp vrid 1 track interface Gigabitethernet0/0/0
• D.track vrrp vrid 1 interface Gigabitethernet0/0/0

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In the VRRP hot backup, which of the following statement regarding the AC used to establish the address of the CAPWAP tunnel is true?

• A.Any address configured in AC can be used
• B.Physical address of the main AC
• C.The physical address of the standby MC
• D.VRRP virtual addresses of the active and standby ACs

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What is the role of the Hello message in PIM-SM? (Multiple choice)

• A.Neighbors' capability negotiation
• B.Establish and maintain neighbor relations
• C.Register with RP
• D.Election network segment BDR

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What is the BFD version number supported by the VRP version?

• A.Version 1
• B.Version 4
• C.Version 2
• D.version 3

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Which of the following descriptions are correct about two-tier roaming and three-tier roaming? (Multiple choice)

• A.Three-tier roaming means that the client roams between different subnets
• B.Layer 2 roaming means that the client roams in the same subnet
• C.If the VLAN ID associated before and after the STA is the same when roaming, it must belong to Layer 2 roaming
• D.The VLANs on the AP service set associated with the STA before and after Layer 3 roaming must be the same

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