Which of the following description of the traditional data center data center is wrong?

Which of the following description of the traditional data center data center is wrong?
A . In the data center network, the "region" magic score corresponds to the division of VLANs.
B . Terminals in different VLANs need to access each other through gateways, Layer 2 isolation, and Layer 3 connectivity.
C . The traditional data center is mainly divided based on functions, such as WEB, APP, DB, office area, business area, inline area, outreach area, etc.
D . Different areas have different functions. Therefore, when data needs to be accessed each other, the two communicating parties are required to be in the same VLAN or Layer 2 network.

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Answer: D