Which of the following descriptions about deploying a Mesh network is wrong?

A company needs to hold a temporary product launch event. Since there is no wired network foundation at the launch site and time is tight, the network engineer plans to use wireless Mesh networking.

Which of the following descriptions about deploying a Mesh network is wrong?
A . Mesh links can be established between MPP and MP nodes in the Mesh network, and Mesh links can also be established between MP and MP nodes.
B. Mesh link is usually recommended to use 5G radio frequency interface to establish, not recommended to use 2.4G radio frequency interface
C. The Mesh link can use the DFS channel. When a radar signal is detected, the channel will automatically switch, and the wireless service will not be interrupted.
D. When a new AP is added to the Mesh network, the AP can automatically discover the network topology and determine the best transmission path after it goes online

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Answer: C