Which of the following statements about choosing an authentication point location in a network is incorrect?

Which of the following statements about choosing an authentication point location in a network is incorrect?
A . Deploying authentication at the access layer of the network is conducive to fine-grained management of permissions and high network security
B . After the user authentication point is moved from the access layer to the aggregation layer, the user’s MAC authentication may fail
C . Setting the user authentication point at the access layer has advantages and disadvantages compared to setting it at the aggregation layer or the core layer. Policy linkage can be used as a solution.
D . When the user authentication point is moved from the access layer to the aggregation layer and the core layer, the number of authentication points is greatly reduced, which can effectively relieve the pressure on the AAA server

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Answer: B