The following statement about the three-layer switch is correct.

The following statement about the three-layer switch is correct.
A . The three-layer switch actually combines part of the functions of the two-layer switch and router, which improves the network integration and enhances the forwarding performance
B . The three-layer switch functionally realizes the division of VLANs, the two-layer switching within the VLAN and the functions of inter-VLAN routing
C . The Layer 3 switch contains two parts: a Layer 2 VLAN forwarding engine and a Layer 3 forwarding engine
D . The three-layer forwarding engine of the three-layer switch is equivalent to the function of the router in the traditional networking, using hardware ASIC technology to realize the three-layer routing and forwarding across network segments

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Answer: ABCD