Compared with the traditional L2/L3 network design, which advantages does VSS have? (Choose four)

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A.
VSS improves the operational efficiency by simplifying network to reduce the cost of the switch management to at least 50%.

B.
VSS can optimize the uninterrupted communication

C.
VSS can expand the system bandwidth to 1.4 Tbps.

D.
VSS uses the existing multilayer switching structure

E.
VSS can expand the system bandwidth to 1.8 Tbps.