As shown in the figure, when running R1.R2.R3 OSPF and declaring their respective loops, what is wrong as described below?

• A.R2 Area0 filter import R3 can be used in the commanded loop routing ring
• B.R2 filter-policy export R3 can use the loopback route of the command filtering.
• C.R2 Area1 filter export R3 can use the loopback route of the command filtering
• D.R1 filter-policy import R3 can use filtered loop routing ring

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On a broadcast network, DIS election starts only after the neighbor relationship is established.

• A.TRUE
• B.FALSE

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The following is about reliability, describing LDP errors?

• A.LDP GR (Graceful Restart) MPLS uses the feature that the plane and the control plane are separated, and is forwarded when the device protocol is replaced by the restart or the primary or the reverse.
  No interruption.
• B.Hand-configured dynamic LDP FRR 32 LDP LSP policy is the default route to the backup device.
• C.The LDP FRR LSP LSP can also be generated from the mapping of the non-lowest hops as the privilege label, and the primary device is configured as the primary device. The table forwarding entry B. LDP IGP IGP LDP IGP is associated with the association. , guaranteed to be consistent with the path

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LDP IGP IGP LDP IGP IGP LDP and the communication are used to suppress the distribution of reachable
routes to ensure that the network convergence is coordinated and the path is maintained.
Consistently, minimize the loss of traffic and improve the reliability of the entire network.

• A.False
• B.True

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Which of the following techniques use tunneling technology to implement a communication space for IPv6
addresses?

• A.NAT64
• B.6to4
• C.Dual Stack
• D.ISATAP

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