In a data communication session between two hosts, which level does the session layer of the oSI model of the host on one end communicate with the osl mode of the host on the other end?

• A.Communicate with the data link layer at the other end
• B.Communicate with the conversation layer on the other end B Communicate with the application layer at the other end
• C.Communicate with the physical layer at the other end
• D.Communicate with the presentation layer at the other end

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IPv6 introduces the Solicited-Node address, which is described correctly below (multiple choice)

• A.This is a specific address that is used for resolution in ARPv6. The MAC address.
• B.IPv6 introduced the Solicited-Node address to support IPv6 multicast.
• C.If the Solicited-Node address is not configured, the router automatically generates one on each interface.
• D.The Solicited-Node address on the router interface is automatically generated and can have multiple.

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R3 is not established with the RI's IS-IS neighbor, and according to the information in this figure, the possible cause is?

• A.R3 does not match the IS-Level of R1
• B.R3 and R1
• C.R3 duplicates the System ID of R1
• D.R3 and R1 interconnection ports circuit-type do not match the lH authentication of

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In the laboratory network, the network is built according to the following topology diagram, SWI is the default configuration, and SW2 disables the switch STP function.

• A.SG0/0/2 for WI enters the Discarding state
• B.No interface is backed up for blocking
• C.SW2 and G0/0/1 enters the Discarding state
• D.SW2 G0/0/2 enters discarding state
• E.SWI's G0/0/1 enters the Discarding state

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Which of the following DNS resource records are legitimate?

• A.PTR
• B.MX
• C.A
• D.NS
• E.FQDN

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