Network slicing technology can divide exclusive network resources in the network to carry high-value service traffic. Which of the following descriptions about network slicing is wrong?

Network slicing technology can divide exclusive network resources in the network to carry high-value service traffic. Which of the following descriptions about network slicing is wrong?
A . The channelized sub-interface technology adopts single-layer scheduling to realize flexible and refined management of interface resources and provide bandwidth guarantee
B . Generally, network slicing can be realized based on the channelized sub-interface FlexE technology
C . The layer used by the network slicing technology is different from that of the SR tunnel, and can be used at the same time as the SR tunnel
D . FlexE technology divides resources according to TDM time slots, satisfies the requirements of exclusive resource sharing and isolation, and realizes flexible and refined management of interface resources

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Answer: A