If during the PPP authentication process, the authenticatee sends the wrong user name and password to the authenticator, what type of message will the authenticator send to the authenticatee?

When the switch port sends a data frame carrying the same VLAN TAG and PVID, it must strip the VLAN TAG and forward it.

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

As shown in the network below, all switches enable STP protocol. Disable SWA's G0/0/2 port configuration BPDU sending function, SWC G0/0/1 re-converges to become the root port, about this process, which of the following statements are correct? (Multiple Choice)

Which WLAN security policies support the link authentication method of Open mode? (Multiple Choice)