Which statement best defines a virtual switch in network virtualization?

Which statement best defines a virtual switch in network virtualization?

• A. A software-based switch that connects virtual systems to form a network.
• B. A hardware device that routes packets between networks.
• C. A firewall module that filters traffic.
• D. A management console for virtualization environments.

Answer: (A)

In network virtualization, the key idea is that virtual machines need a way to communicate with each other just like they would on a real LAN. A virtual switch is software that runs in the hypervisor and acts like a switch for those virtual machines. It forwards Ethernet frames between the VMs’ virtual NICs, handling the data‑plane switching inside the host, and it can also connect to physical NICs or span multiple hosts to extend the network. This lets VMs form networks, segment traffic with features like VLANs, and exchange data as if they were on a physical switch. This is different from a hardware router, which moves packets between different networks (layer 3 routing), a firewall module that inspects and filters traffic, or a management console that oversees virtualization resources. The virtual switch’s primary role is to provide the switching fabric for virtual machines within the virtualization environment.

In network virtualization, the key idea is that virtual machines need a way to communicate with each other just like they would on a real LAN. A virtual switch is software that runs in the hypervisor and acts like a switch for those virtual machines. It forwards Ethernet frames between the VMs’ virtual NICs, handling the data‑plane switching inside the host, and it can also connect to physical NICs or span multiple hosts to extend the network. This lets VMs form networks, segment traffic with features like VLANs, and exchange data as if they were on a physical switch.

This is different from a hardware router, which moves packets between different networks (layer 3 routing), a firewall module that inspects and filters traffic, or a management console that oversees virtualization resources. The virtual switch’s primary role is to provide the switching fabric for virtual machines within the virtualization environment.