Regarding the BGP anti-ring mechanism, which of the following description is correct? (Multiple Choice)

• A.The Cluster List attribute is used for the anti-ring in the reflector cluster. If the router discovers that the cluster list of the route entry contains its own cluster ID, it will reject the route.
• B.You can use the AS_CONFED_SET attribute to prevent loops within the federation.
• C.Routes learned from IBGP are not advertised to IBGP neighbors to prevent routing loops within the AS.
• D.Use the AS_PATH attribute between autonomous systems to prevent loops.

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What benefits can be achieved after using WRED? (Multiple Choice)

• A.Avoid TCP global synchronization
• B.Thoroughly avoid congestion
• C.Provide minimum bandwidth guarantee
• D.Can avoid UDP taking up most of the bandwidth when it is congested
• E.Provide a certain low latency

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What are the common methods of learning routes in BGP? (Multiple Choice)

• A.Introducing static route
• B.Introducing BGP routes of other AS
• C.Receive neighbor routing information
• D.Introducing direct route

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Which of the following does the digital certificate not contain?

• A.Digital signature
• B.Digital envelope
• C.Issuer
• D.Public key information

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There are now two gateway routers that provide services for hosts on a LAN network to connect to the extranet. What techniques should be used on these two redundant routers to make them the default gateway for hosts in the LAN network?

• A.BOOTP
• B.OSPF
• C.DHCP
• D.VRRP
• E.RIP 

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