The OSI reference model from high-level to bottom-level is ().

To ensure that the same data flow is forwarded on the same physical link, which load sharing method does the Eth-Trunk adopt? ()

As shown in the figure below, router A has Telnet router B through IP address 10.0.12.2. In the current interface, which of the following operations will cause the Telnet session of Router A and Router B to be interrupted? (Multiple Choice)

By default, what is the STP Forward Delay time in seconds?

If the administrator wants to completely delete the old device configuration file, the following command is correct ().