Knowing About Virtual CPUs, Virtual Switches And Virtual LANs

Asked By James J Khan 30 points N/A Posted on - 05/27/2015

What are the definitions of the following: virtual CPUs, virtual switches and virtual LANs? Is there a link between these two words in computing and what extent? Are there various types of virtual switches, and virtual CPUs? What are the characteristics of each type respectively? Philip is my name and a grade six student from South Africa.

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Answered By Sharath Reddy 590495 points N/A #189691

Knowing About Virtual CPUs, Virtual Switches And Virtual LANs

A virtual CPU or vCPU is also called a virtual processor. It is a physical CPU or central processing unit assigned to a VM or virtual machine. For every virtual machine, one vCPU is allocated by default. On the other hand, if the host has numerous CPU cores available, execution contexts will be assigned by a CPU scheduler. The vCPU now becomes a sequence of time slots on logical processors.

Also, take note that adding more vCPUs will not necessarily improve the performance. The reason is that as the number of vCPUs increase, it becomes harder for the scheduler to manage time slots on the physical CPUs. Also, the wait time can degrade performance. A virtual switch is an application or a program that permits a virtual machine to communicate with another.

The same with the physical Ethernet switch, its counterpart, a virtual switch doesn’t only forward data packets. It can also cleverly control communication on the network by analyzing packets before sending them.

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• Posted on - 11/17/2015
• Question Category: Hardware