Configure queue-based traffic shaping. If the queue length exceeds the cache size, the tail drop is performed by default.

• A.False
• B.True

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There are two community-filters:
ip community-filter 1 permit 100:1 200:1
ip community-filter 2 permit 100:1
ip community-filter 2 permit 200:1
Which of the following statements are true? (Multiple Choice)

• A.A BGP route matches community-filter 1 only when the community attributes carried in the route contain both 100:1 and 200:1.
• B.A BGP route matches community-filter 1 as long as the community attributes carried in the route contain 100:1 or 200:1, or both.
• C.A BGP route matches community-filter 2 only when the community attributes carried in the route contain both 100:1 and 200:1.
• D.A BGP route matches community-filter 2 as long as the community attributes carried in the route contain 100:1 or 200:1, or both.

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As shown in the following figure, in IPv4 and IPv6 environments the SEL value in an IS-IS NET address is always 00.

• A.False
• B.Ture

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Which of the following description is true about the OSPF virtual link?

• A.The virtual link can be used to solve the problem that area 0 is divided.
• B.The cost of the virtual link is 0, it is the optimal link.
• C.The virtual link uses the outbound interface P as the link address.
• D.A virtual connection can be established in any area, and it belongs to the area itself after it is established.

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As shown below, R1 and R2 establish an E-BGP neighbor and enable BFD detection. The following statement which is correct?

• A.The detection time of BFD packets on R1 is 660ms.
• B.The detection time of BFD packets on R2 is 600ms.
• C.The detection time of BFD packets on R2 is 800ms.
• D.The detection time of BFD packets on R1 is 1280ms.

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