Which of the following statements about BGP synchronization are wrong?

In the IS-IS network as shown in the figure, when the route is stable, shut down the interface where the IP address 192.168.24.1 on the RTB is located. Then IS-IS topology ______, IP routing information ______.

As shown in the figure, 4 routers are connected to an Ethernet link. The router interface is a broadcast network type, and the DIS election has been carried out and an adjacency relationship has been established.

If the RTA restarts at this time, after the restart is completed, the DIS on this link is ______

In the IS-IS network as shown in the figure, RTA, RTC, RTD, and RTE establish a Level-2 adjacency relationship with each other; RTB, RTA, and RTC establish a Level-1 adjacency relationship. After the reason of each router is stable, when RTB accesses 192.168.5.1, it chooses the next hop as ______.
If RTA adds the following configuration at this time:
RTA-isis-1]import-route isis level-2 into level-1
Then when RTB accesses 192.168.5.1 again, choose the next hop as ______.

IS-IS sends ________ messages periodically on the broadcast network type link.