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 <h2>Client-server Model</h2>
 <p>
    The client-server model is a design pattern or architecture that constrains system/solution activities between two parties; a client and a server. The concept of client-server is based on a request-response relationship but isn’t always representative of a physical machine, location or person.
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  <p>
    Where a client makes a request for a resource from a server, the server responds to the client with the requested resource or a reason that its unavailable.
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  <p>
    We tend to consider browsers, phones and laptops as straight-up clients. They send requests out to the internet somewhere then process the response. For the most this is generally true but there are scenarios, especially on the back-end where a server in one relationship can be a client in another.
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