As shown in the figure below, which network device can Host A and Host B use to communicate?

In a subnet mask is 255.240.0.0 network, as follows () is a Class A valid host addresses.

As shown in the following figure, all links are Ethernet links, and all routers run OSPF. How many DR are elected in the entire network?

ip route-static 10_0.2.2 255255/55.25510.0.12.2 preference 20, about this command, which is the correct statement? (Multiple Choice)

SR encapsulates the segment list identifying a forwarding path into a data packet header for transmission After receiving the data packet, the receiver end parses the segment list. If the top SID of the segment list belongs to the local node, the top SID is popped out, and then further processing is perfermed, if the top SID of the segment list does not belong to the local node, the data packet is forwarded to the next node in equal cost multiple path(ECMP) mode?