The routing attributes of the three routing entries are shown in the figure. Assuming that the next hop of the three routing entries are all reachable, when the three routing entries arrive at the BP router in sequence, by default, BGP will finally select one route entry?

As shown in the figure, an engineer uses 4 routers to test branch network interoperability. Among them, R1, R2, and R3 in branch 1 deploy OSPF to implement network interoperability. R2, R3, and R4 in branch 2 deploy IS-S to implement network interoperability. Now the engineer wants to implement R1 to access the loopback interface address of R4. Which of the following operations can meet this requirement?

Which of the following reasons may cause the hosts in the same VLAN of the LAN to fail to communicate with each other?

Part of the configuration of R1 is as follows. Which statement about OSPF on R1 is correct?
ospf 1 router-id 172.16.1.1
area 0.000
network 10.1.12.1 0.0.0.0
network 10.1"3"0.0.0.0
network 172.16/1 1 0.0.0.0
ospf 2 vpn-instance tt
area QQO.O
network 10J J 1 0.000

What is the command to adjust the link cost value of an IS-IS interface?