Why is a virtual network useful?
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What’s the use of a virtual network since you have to go through your physical router and switches to interact anyway.
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Many of the concepts that you learn with physical routers and switches in terms of networking are foundational to your theoretical understanding of the rules and principles of networking. Today, you're more likely to work in a cloud environment in which you will not have access to the physical hardware but must still do networking, virtually instead. Your interaction there will not be dealing with hardware but configuration management to ensure the connectivity you need for your cloud environment.