Fast detection technology can detect communication failures with neighboring equipment as early as possible, so that the system can take measures in time to ensure uninterrupted business.

• A.True
• B.False

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Regarding the OSPF route aggregation command, which of the descriptions is correct? (Multiple choice)

• A.advertise is the default parameter of the abr-summary command, that is, if not-advertise is specified in the abr-sumary command, the default is advertise
• B.The abr-summary command is a command in the OSPF view
• C.The abr-summary command is a command in OSPF area view
• D.not-advertise is the default parameter of the abr-summary command, that is, if advertise is not specified in the abr-summary command, the default is not -advertis

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Use the IP prefix list as shown in the figure for route matching. Which of the following routes can be matched?
ip ip-prefix List1 index 10 permit 192.168.1.0 24 greater-equal 24 less-equal 27

• A.192.168.3.0/25
• B.192.168.1.0/27
• C.192.168.2.0/24
• D.192.168.1.0/23

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Regarding the description of the summary automatic command and BGP aggregation, which of the following is incorrect?

• A.After configuring this command, BGP only sends aggregated routes to the peer
• B.This command is used to realize automatic aggregation, and its priority is higher than manual aggregation
• C.This command is used to enable automatic aggregation of locally imported routes
• D.After configuring this command, BGP will aggregate routes according to natural network segments

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The following description of the BGP UPDATE message, which is wrong?

• A.Generally, the UPDATE message is sent after Keepalive
• B.UPDATE message can carry multiple reachable routing information
• C.The UPDATE message is sent in the form of multicast
• D.UPDATE message is used to transfer routing information between BGP peers

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