Features of distance vector routing protocols include ________. (select one or more)

From RTA to RTD, etc., perform IS-IS networking according to the diagram, and the Stem-IDs of RTA, RTC, and RTD are shown in the diagram.
Then in the following options ______ can be used as the Stem-ID of RTB.

In the networking shown in the figure, if RTA is required to access the 2::/64 network segment of RTB, which of the following commands needs to be configured on RTA?

There are a lot of static routes with tags 100 and 200 on the RTA. RTA and RTB run OSPF routing protocol, and RTB needs to learn all static routes on RTA. At the same time, it is required that on RTB, the priority of the route with tag 200 is 200.
If the above requirements are fulfilled, which of the following configurations is correct?

The interface configuration of a router is as follows: According to the above information, it can be judged that the tunnel type of the Tunnel0 interface is ____.