AAA is a management mechanism of network security, what security functions it can provide

Before configuring the bpdu-tunnddotlq stp command on the port where the QinQ function of the H3C series switch is enabled, the command that must be configured on this port is

As shown in the network, the switches all run RSTP. Initially, SWA, SWB and SWC are interconnected through links 1, 2, and 3. When the following changes occur in the network connection, the correct statement is:

The host PCA, PCB and PCC are respectively connected to the GigabitEthernet1/0/1 port of the switch SWA UP, Ethernet1/0/2 and Ethernet1/0/3 ports, and their addresses are in the same network segment, i exchange & SWA are configured
[SWA]vlan 10
[SWA-vlan10]port ethernet 1/0/1
[SWA-vlan10]quit
[SWA]vlan 20
[SWA-vlan20]port ethernet 1/0/2
[SWA-vlan20]quit
[SWA]vlan 30
[SWA-vlan30]port ethernet 1/0/3
[SWA-vlan30]quit
[SWA]interface ethernet 1/0/1
[SWA-Ethernet1/0/1]port link-type hybrid
[SWA-Ethernet1 /0/1] port hybrid vlan 10 30 untagged
[SWA-Ethernet1/0/1]quit
[SWA]interface ethernet 1/0/2
[SWA-Ethernet1/0/2]port link-type hybrid
[SWA-Ethernet1 /0/2]port hybrid vlan 20 30 untagged
[SWA-Ethernet1/0/2]quit
[SWA]interface ethernet 1/0/3
[SWA-Ethernet1/0/3]port link-type hybrid
[SWA-Ethernet1 /0/3]port hybrid vlan 10 20 30 untagged
-Can judge __ (choose one or more) based on the above information

In the switching network as shown in the figure, VLAN 10 is set as Super VLAN on the switch SWA, VLAN 2 and VLAN 3 are Sub VLANs of VLAN 10, Port Ethernet1/0/3 is a Trunk port, PVID is VLAN 1, allowing all VLANs to pass ; Create VLAN2~VLAN20 on the switch SWB, port Ethernet1/0/4 as Trunk port, PVID is VLAN1, allowing all VLANs to pass, after setting the IP address of each device as shown in the figure, the following statement is correct