The prefix list (IP-Prefix List) can match the IP address prefix length and mask length at the same time because it has three parameters: less-equal-value, mask- length and greater-equal-value, so which of the following can correctly describe the relationship between these three parameters?

• A.mask-length<=greater-equal-value<=less-equal-value<=32
• B.greater-equal-value<=less-equal-value<=mask-length<=32
• C.mask-length<=less-equal-value<=greater-equal-value<=32
• D.less-equal-value<=mask-length<=greater-equal-value<=32

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BFD can quickly detect faults in channels at multiple network layers, ensuring high reliability.
To which of the following layers does BFD belong?

• A.Application layer
• B.Data link layer
• C.Physical layer
• D.Network layer

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By default, if no router ID is configured but multiple loopback interface addresses are configured, BGP selects the largest loopback interface address as the router ID.

• A.TRUE
• B.FALSE

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Regarding the description of configuring the security level of the security zone of the firewall, which of the following is wrong?

• A.Security levels can only be set for custom security areas
• B.The newly created security area, the system defaults its security level to 1
• C.Once the security level is set, it is not allowed to change
• D.In the same system, two security zones are not allowed to configure the same security level

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On an IS-IS network, all routers generate LSPs. Which of the following types of information isnotcontained in the LSPs generated by pseudonodes?

• A.Interface information
• B.Information about supported network protocols
• C.Route information
• D.Neighbor information

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