On an IS-IS network, routers send LSPs to exchange link state information. LSPs are classified into Level-1 LSPs and Level-2 LSPs and have the same format. Which of the following parts constitute the LSP ID in an LSP?

• A.LSP Number
• B.Pseudonode ID
• C.System ID
• D.IS Type

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On an enterprise WLAN where Portal authentication is deployed, an AC functions as an access device and communicates with a Portal server using the Portal protocol. Which of the following statements are true about the Portal protocol?

• A.The HTTP or HTTPS protocol can be used as the Portal access or authentication protocol.
• B.By default, the access device processes Portal protocol packets through port 2000.
• C.By default, the device uses the destination port number 50100 to proactively send packets to the Portal server.
• D.Portal protocol packets are transmitted over TCP.

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DDoS attack means that the attacker controls a large number of zombie hosts and sends a large number of carefully constructed attack messages to the target network, thereby causing the attacker to refuse to provide services to requests from normal users.

• A.TRUE
• B.FALSE

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The output of a certain router ip as-path-filter is as shown in the figure.

So which of the following descriptions of this configuration is correct?

• A.This configuration matches traffic originating from any AS and reaching the router. The router belongs to AS 12345.
• B.This configuration matches traffic originating from AS 12345 and passing through any AS to reach the router.
• C.This configuration matches originating from any AS, passing through AS 12345, then arriving at any other AS, and finally reaching the router.
• D.This configuration matches traffic originating from any AS and passing through AS 12345 to reach the router.

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An enterprise network runs OSPF to implement network communication. Which of the following types of LSAs may be generated by an ABR?

• A.NSSA LSA
• B.AS External LSA
• C.Network Summary LSA
• D.ASBR Summary LSA

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