If the BGP neighbor is successfully established, the neighbor status viewed by the displabgp peer command is ______.

• A.Established
• B.Active
• C.Full
• D.Connect

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As shown in the figure, the actual bandwidth of the Ethernet interface E1/0 of the MSR router is 10Mbps, and the actual link bandwidth of the serial port S2/0 is 64Kbps.

In order to preferentially use high-bandwidth links and achieve the purpose of route backup, which of the following solutions is the most reasonable?

• A.Both Ethernet interface E1/0 and serial port S2/0 run RIP protocol
• B.Set the static route, the outgoing interface is the serial port S2/0 and the Ethernet interface E1/0, the priority value is set the same
• C.The Ethernet interface runs OSPF protocol. Then set the static route, the outgoing interface is serial port S2/0, and the priority value is set to 80
• D.The Ethernet interface runs RIP protocol. Then set the static route, the outgoing interface is serial port S2/0, and the priority value is set to 80

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In a certain network project, the client considers that network users may increase substantially in the future, so the network is required to have better scalability.
Which of the following measures can improve the scalability of the network?

• A.Use RIP-1 for routing configuration
• B.Use OSPF protocol and plan network layered architecture
• C.Deploy data encryption between the core and remote branches
• D.Use static routing for routing configuration

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For the NSEL field in the NSAP address, the following description is correct.

• A.NSEL is used to indicate the link layer protocol type
• B.In the IP routing environment, the value of NSEL is usually FF
• C.NSEL is used to indicate the upper layer protocol type, similar to the Protocol field in the IP protocol
• D.NET can be regarded as the NSAP address with NSEL being 0

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The following belong to the core layer function is _______. (Choose one or more)

• A.Necessary routing strategy
• B.High-speed packet switching
• C.Possess a large number of interfaces for connecting with end user computers
• D.Access security control

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