Regarding the neighbor table in the OSPF protocol, the following statement is correct ________.

• A.The neighbor table of the router is related to area division. Each region maintains its own independent neighbor table
• B.The router will periodically send Hello packets to the neighbors in the neighbor table to check the status of the neighbors
• C.If the neighbor's Hello message is not received within a certain time interval, the neighbor will be considered invalid. At the same time, the system starts the aging timer and deletes the neighbor immediately after the aging timer expires.
• D.The neighbor table records all routers that have established neighbor relationships.

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In the network shown in the figure, the BGP route learning among the routers is normal, and the BGP route attributes all take the default values.
After importing route 8.0.0.0 into BGP on RTA, if the next hop of route 8.0.0.0 on RTD is to point to RTB, the following adjustment methods are feasible again ______.

• A.Set the Local Preference value of the route sent by RTD to RTB to 50
• B.Set the Local Preference value of the route sent by RTD to RTC to 50
• C.Set the Local Preference value of the route sent by RTD to RTC to 200
• D.Set the Local Preference value of the route sent by RTD to RTB to 200

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The administrator wants to configure the OSPF routing priority value on the MSR router as 100. Which of the following commands is correct?

• A.Router]ospf preference 100
• B.Router-ospf-1]ospf preference 100
• C.Router]preference 100
• D.Router-ospf-1]preference 100

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The characteristics of the distance vector routing protocol include ________. (Choose one or more)

• A.Take the cost to the destination as the route metric
• B.Send routing updates periodically
• C.Fast routing convergence
• D.Deliver routing updates hop by hop

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There is a 192.168.1.0/27 in the router's IP routing table. To import it into BGP, which of the following commands should be used?

• A.network 192.168.1.0 255.255.255.224
• B.network 192.168.1.0 mask 0.0.0.31
• C.network 192.168.1.0 mask 255.255.255.224
• D.network 192.168.1.0 0.0.0.31

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