Which of the following descriptions about AS attributes in BGP is wrong?

• A.AS_Path is a recognized must-follow attribute
• B.In order to avoid routing loops that may be caused by route aggregation, BGP designed the AS_Set attribute
• C.AS_Set attribute is an ordered AS_Path attribute
• D.When the BGP Speaker advertises this route to the IBGP peer, it will not change the AS_Path attribute related to this route

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On a BGP network, a route-policy can be used to modify route attributes. Which of the following statements is false about route-policies?

• A.When OSPF routes are imported using the import command, a route-policy can be used to change their default MED value.
• B.When direct routes are imported using the import command, a route-policy can be used to filter out the routes that you do not want to advertise.
• C.When routes are imported using the network command, a route-policy cannot be used to modify the attributes of the imported routes.
• D.In the address family view, the peer command can be run to reference a route-policy to modify the local preference of the routes to be advertised.

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When pinging the IP address of an interface of the firewall on the firewall, these packets will be handed over to the internal module of the firewall for processing and will not be forwarded.

• A.FALSE
• B.TRUE

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Routes are injected into BGP through the network command.
Which is wrong? (Multiple choice)

• A.The mask length must be strictly matched
• B.Just match the prefix, and the mask length does not have to be strictly matched
• C.The route cannot be an IGP route, it can only be a direct route
• D.The route must exist in the IP routing table and be the best route

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Four port roles are defined in RSTP. The Port role values of the Alternate port and the Backup port are consistent in the Flags field of the packet, both are 01.

• A.FALSE
• B.TRUE

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