The subnet mask of a network segment 150.25.0.O is 255.255.224.0, then what is a valid host address in the network segment?

In the broadcast network as shown in the figure, OSPF runs on four routers in the same area and on the same network segment. OSPF will automatically elect one DR and multiple BDRs to achieve better backup results.

In the VRP interface, use the command startup saved-configuration backup.cfg to configure the startup.cfg file for the next startup.

At present, the company has a network administrator, and the AR2200 in the company network can be remotely managed by directly entering the password through Telnet. After the two new network administrators arrived, the company hopes to assign their own user names and passwords to all administrators, as well as different levels of authority. So how should it be done? Multiple choices

On the VRP platform, the default protocol priority of routes in the direct routing, static routing, RIP, OSPF area is: