In order to distinguish different users and provide different network services on the AP. Which of the following can be configured?

All ports on the root bridge exchange machine are designated ends ()

What is the destination IP address of the DHCP DISCOER message?

In the network shown in the figure below, two switches are connected by four links, COPPER refers to electrical interface, and FIBER refers to optical interface. Which of the following two interfaces can achieve link aggregation?

On Huawei ARG3 series routers, what authentication modes does AAA support? ()