Which of the following regular expressions can only match BGP routing entries that pass through AS200 and then AS300?

• A._(200 300)_
• B._[200 300]_
• C.^200|^300
• D.200$|300$

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LDP messages are exchanged between LSRs running the LDP protocol. LDP messages can be divided into four types according to their functions. Which of the following is not a message type of LDP?

• A.announcement message
• B.label exchange message
• C.discovery message
• D.conversation message

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The ORF function of BGP can control the routing entries sent by neighbors. In order to achieve this purpose, the BGP router will send the list of routes to be filtered to the neighbors. Which tool is generally used to send the list to the neighbors?

• A.Filter-Policy
• B.A, CL
• C.IP Prefix List
• D.Route-Policy

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esigth uses different colors to distinguish different alarm levels, red represents emergency, orange represents important, and yellow represents The table is secondary, and blue represents the prompt. Which of the following statements about different alarm levels is correct: (multiple choice)

• A.Prompt: A potential or imminent business-impacting failure has been detecteD. but currently has little business impact
• B.Important: An alarm that has affected the business and will have serious consequences if not handled in time
• C.Minor: There is currently a certain impact on the business, but corrective actions are required to prevent serious failure alarms
• D.Urgent: Alerts that have affected the business and require immediate corrective action

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The configuration shown in the figure is performed on R2 to filter all received routes. Assuming that there is a BGP route with the AS_Path attribute of [100 200 300 400] on R1 that needs to be sent to R2, please help the network administrator to adjust the order of AS in the AS_Path attribute of the route on R1 to ensure that the routing entries will not be filtered by the routing policy of R2. (Sorting questions)

• A.100
• B.200
• C.300
• D.400

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