CompTIA Network+

Answer: A - Virtual Switches route data based on the MAC address found in the data packet it receives.

Key Takeaway: In physical systems, switches will look at the MAC address of the data it receives and the same goes for virtual environments. A virtual switch will also contain a few added functional units, A VLAN tagging unit, a security unit, and a packet filtering unit. Even in virtual networks, if communication between different Virtual Local Area Networks (VLANs) is desired, a layer 2 switch will not suffice and a higher layer device will be needed such as a router, or a switch with layer 3 capabilities.