Answer :
Virtual Switch operates primarily at the data link layer to pass frames between nodes
The hypervisor establishes a connection between the virtual machine and the host as soon as the vNIC for that virtual machine is chosen. This connection may be referred to as a switch or a bridge depending on the hypervisor. This virtual switch, also known as a bridge, is a logically defined device that transmits frames between nodes at the Data Link layer.
What is a Virtual Switch?
One virtual machine (VM) can communicate with another through the use of a virtual switch (vSwitch), which is a piece of software. Additionally, virtual switches are used to connect physical and virtual networks and to transport a VM's traffic to other VMs or a physical network.
VMs may access and use Ethernet networks thanks to the interaction between virtual switches, virtual machines, and actual network adapters. With the exception of some sophisticated characteristics found in physical switches, such as the capacity to build network loops, virtual switches provide almost the same services as normal switches.
A virtual switch does more than merely forward data packets, exactly like its actual Ethernet switch counterpart. By reviewing packets before transmitting them, it can intelligently steer traffic across a network. A virtual switch can be incorporated into a server's hardware as part of the firmware, as some suppliers do with their virtualization software.
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