Regarding the description of VRRP Fast Switching, the error is ?

Use VRRP to monitor BFD sessions or EFM features, either in BPD sessions or EFM session states After the change, the VRRP module is notified to achieve fast VRRP switching
A VRRP backup group cannot monitor Peer BFD, Link BFD, and Normal BFD
at the same time If you configure to monitor multiple BFDs at the same time Then the various configurations are interrelated and may have an impact
When a VRRP backup group monitors normal BFD, when the BFD state changes, the active-standby state is changed by modifying the backup group priority

Answer(s): B,C

What are the following advanced features supported by BGP EVPN?

Answer(s): A,B,C,D

As shown in the figure, the overload bit of ISIS is set in the configuration of router R3, and the following statement is correct

R3's direct route will be ignored by R1 and R2 because of the setting of the overload bit .
When the router runs out of memory, the system automatically sets the overload flag bit in the sent LSP packets. Irrelevant to whether the user has a set-overload command configured Routes introduced by R3 through import-route will not be published.
The LSP of R3 will not be able to spread to R1 and R2
R3 initiates the load state, and R1 and RZ will not calculate the LSP of R3 cattle in the SP tree.

Answer(s): B,C

Is the following statement about the multicast address used by 0SPFv3 correct?

Answer(s): A,C

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