Apply the following ACL in SNMP: which of the following is wrong?

On the VRP platform, if you want the ping program to use the specified IP address as the source address of the echo request message, which of the following can be used?
One parameter?

An existing switch is directly connected to the designated port of the peer device through a port, but the port does not forward any packets but can be connected.
Receive a BPDU to listen for network changes, then the role of the port should be ().

IEEE LAN standards are mainly defined 802.X protocol suite, including wireless LAN (WLAN) standard ().

A host has established a telnet connection with the router attached to interface G0/0/0. Which of the following statements are correct? (Choose two)