The IS-IS Level-1 neighbor relationship between R3 and R4 is not established. According to the information in this figure_What is the possible reason?

• A.R3andR4different area codes
• B.R3andR4ofIS-LevelMismatch
• C.R3andR4the interconnect interfacecircuit-typeMismatch
• D.R3andR1ofIIHAuthentication failed

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As shown in the figure, in a medium-sized network, BGP generally deploys dual RRs to improve R reliability. When deploying dual RRs, the Cluster IDs of the two RRs are generally set to be the same. The reason for this is

• A.Prevent the client from receiving too many routes and causing it to run out of memory
• B.prevent suboptimal
• C.prevent loops
• D.Prevent RR from receiving too many routes and causing insufficient memory

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From this figure, we can conclude that

• A.R4andee8C. aOe2.baf3only establishedIPv6ofIS-ISNeighbor
• B.R4andee8c.aOc2.baf3establishedIPv4,IPv6ofIS-ISNeighbor
• C.R4andee8c.aOc2.bat3only establishedIPv4ofIS-ISNeighbor
• D.R4not anyIS-ISNeighbor

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From the user's point of view, any phenomenon that affects the business can be defined as a failure.

• A.FALSE
• B.TRUE

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After reset isis all is executeD. the IS-Is protocol process needs to be restarted and neighbors need to be re-establisheD. but various IS-IS statistics will not be cleared.

• A.True
• B.False

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