A.TRUE

B.FALSE

A.Preparation for cutover

B.Roll back party

C.Contingency plans

D.Cutover implementation

A.untrust-trust

B.untrust-dmz

C.trust-local

D.trust-untrust

A.In asynchronous mode, the systems will send BFD control packets according to the negotiated period.
If a system does not receive the BFD control packet from the peer within the detection time, it will declare the status of the BFD session as Down.

B.Asynchronous mode is a commonly used BFD detection mode

C.Asynchronous detection mode does not support echo function

D.In query mode, once the BFD session is established, the system will no longer send BFD control packets periodically

A.Both R2 and R3 will generate LSPs of Level 1-2 with ATT set.

B.Both R2 and R3 will generate Level-1 LSPs with ATT set.

C.R1 does not have the LSP generated by R4, so R1 can only communicate with R4 through the default route.

D.R2 and R3 learn default routes from each other, and a routing loop occurs in the network.