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

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• D.Routes introduced by R3 through import-route will not be published.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

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What is the following correct for the process of registering the source-side DR with RP in PIM-SM?

• A.Registered packets are multicast packets.
• B.RP sends a registration stop message as soon as it receives the registration message.
• C.Registered messages are used to build the RPT tree between source DR and RP
• D.Encapsulated in the registered message is multicast service data

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The correct description of the extended features of ISIS is ?

• A.If there are other vendors' devices on the network and do not support the LSP sharding function, the sharding expansion mode must be configured as Model-1, otherwise the message will not be recognized by other vendors' devices.
• B.ISIS can choose whether to authenticate incoming SNP and LSP packets
• C.After you enable the LSP shard extension feature of your router, you can use it without restarting the ISIS process.
• D.When the amount of information in the Link State Protocol data packet PDU to be released by ISIS is too large, the ISIS router will generate multiple LSP shards to carry more ISIS information.

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In RSTP , which port provides a backup path to reach the root node of the spanning tree? What state is the port in?

• A.Designated port and Listening status
• B.Alternate Port and Learning Status
• C.Root Port and Listening Status
• D.Alternate port and Discarding status
• E.Alternate Port and Forwarding Status

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A router Router LSA is shown in the figure below, and the following statement is incorrect?

• A.This router is a DR
• B.The Router ID of this router is 1001
• C.This router supports external route ingestion
• D.This router has established an adjacency relationship

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