There is a 21.22.23.0/22 in the router's IP routing table. To import it into BGP, which one of the following commands should be used?

The networking is as shown in the figure, RTA, RTB are located in AS 100, RTC, RTD, RTE are located in AS 200, AS 100 advertises BGP route 1.0.0.0/24 to AS 200, the main configuration of BGP of RTC and RTD is as follows, may I ask the BGP route on RTE 1.0.0.0/24 Who does the next hop point to?
RTC]
bgp 200
peerRTA as-number 90
peerRTD as-number 200
peerRTA preferred-value 100
peerRTA route-policsetlp import
route-policsetlp permit node 10
appllocal-preference 200
RTD]
bgp 200
peerRTB as-number 100
peerRTC as-number 200
peerRTA route-policsetlp import
route-policsetlp permit node 10
appllocal-preference 300

SOA-based network architecture divides enterprise IT systems into which of the following layers? (Select one or more)

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

As shown, 4 routers are connected to one Ethernet link. The router interface is of broadcast network type, DIS election has been carried out and adjacency has been established.

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