D- After passing, C- passing, after not following the following two-link backup networking, the description is incorrect.

Dual-link backup technology improves network reliability and ensures business stability in important nodes of the network.
The standby AC should always be in the power-on state.
In the process of establishing an active/standby link between the AP and the active and standby ACs, the link established first must be the primary link.
The network service configuration on the active and standby ACs must be consistent.

Answer(s): C

The following description of the management VLAN is correct.

Answer(s): D

The following is true for WLAN networking configuration (Select 3 Answers).

The user should try to ensure the detailed planning data when performing data planning, which will greatly facilitate the later configuration.
Before the AP is configured, the AP must be online.
Configure the WMM template to be directly bound to the antenna.
WMM template is bound to the radio template.

Answer(s): A,B,D