Which option is correct when using Virtual Switching System?

Which option is correct when using Virtual Switching System?
A . Both control planes forward traffic simultaneously
B . Only the active switch forward traffic
C . Both data planes forward traffic simultaneously
D . Only the active switch handles the control plane

Answer: C

Explanation:

Definitely C C again Chapter 1 of CiscoPress CCDP fourth edition Distribution-to Distribution Interconnect with the Virtual Switch Model

The virtual switch system operates differently at different planes. From a control plane point of view, the VSS peers (switches) operate in active standby redundancy mode. The switch in active redundancy mode will maintain the single configuration file for the VSS and sync it to the standby switch, and only the console interface on the active switch is accessible

VSS1440 (in the book) A VSS1440 refers to the VSS formed by two Cisco Catalyst 6500 Series Switches with the Virtual Switching Supervisor 720-10GE. In a VSS, the data plane and switch fabric with capacity of 720 Gbps of supervisor engine in each chassis are active at the same time on both chassis, combining for an active 1400-Gbps switching capacity per VSS. Only one of the virtual switch members has the active control plane. Both chassis are kept in sync with the inter-chassis Stateful Switchover (SSO) mechanism along with Nonstop Forwarding (NSF) to provide nonstop communication even in the event of failure of one of the member supervisor engines or chassis.

https://www.cisco.com/c/en/us/products/collateral/switches/catalyst-6500-virtual-switchingsystem-

1440/prod_qas0900aecd806ed74b.html

In my opinion C & D are correct.

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