In the multicast service model, the SSM model generates entries for each (S, G) information.

• A.TRUE
• B.FALSE

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Four routers run IS-IS and have established adjacencies. The area IDs and router levels are marked in the following figure. Which of the following statements is true?

• A.The LSDB of R2 does not contain the LSP of R4.
• B.The LSDB of R1 does not contain the LSP of R4.
• C.The LSDB of R2 does not contain the LSP of R3.
• D.The LSDB of R3 does not contain the LSP of R4.

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After a switch is powered on, it joins a running stack system. This behavior is called stack joining.

• A.FALSE
• B.TRUE

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A switch runs the RSTP protocol, and its related configuration information is shown in the figure. According to the command configuration, please point out that for Instance 1, the role of the switch is:

• A.Non-root switch
• B.Switch
• C.Root switch
• D.Can't judge

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By default, VRP will automatically aggregate the routes introduced by BGP.

• A.FALSE
• B.TRUE

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