A company applies for a Class C address segment, which needs to be evenly distributed to 8 subsidiaries. The largest subsidiary has 14 computers. Different subsidiaries must be in different network segments. The subnet mask should be designed as ().

As shown in the figure below, the network and switch configuration information are shown in the figure. Which of the following statements is correct? (Multiple choice)

Which layer of the OSI reference model does the router work at?

The Router ID of the OSPF process takes effect immediately after modification.

The routing table output information of a router is shown in the figure. Which of the following statements is correct? (Multiple choice)