By default, which of the following types of secure MA, C addresses will be lost when the device restarts?

In OSPFv3, an LSA whose propagation range is one area has_____kind. (Fill in Arabic numerals only)

As shown in the figure, the network has a loop because STP is not enabled. Which of the following phenomena may be bowed?

The network administrator A wants to use ACL to match only the four routing entries 1, 3.5, and 7 in the figure. How many ACL rules does the network administrator A need to configure at least?

Senior engineers with rich experience can quickly solve faults only by relying on experience, and the efficiency is very high.