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Why We Need ISPs

 

Why We Need ISPs

Without ISPs, every business would need a unique wire to every single customer in the world. And every customer would need a unique wire to every business. This is a mess, and it's physically impossible.

ISPs solve this. They act as the middleman. You only need one wire to your ISP, and they handle the rest.

How It All Works

  1. Everyone Connects to an ISP: Clients (like us) connect to an ISP. Businesses (like websites and servers) also connect to an ISP. The ISP gives an IP address to each connected router or device. This is its unique address on the internet.

  2. A Request is Made: When a request for a website comes from you, your ISP's router sees the destination IP address of that website.

  3. The Delivery Job:

    • Same ISP: If the website's IP address is on the same ISP's network, the ISP just sends the data directly to the server.

    • Different ISP: If the website's IP address is on another ISP's network, your ISP sends the request to that other ISP. ISPs have connections with each other, often in big rooms called Internet Exchange Points (IXPs), where they exchange data. 🤝

The Big Picture

This system saves us from the massive complexity and hardware cost of direct connections. Businesses only need a single, high-speed connection to their ISP, and the ISP takes care of getting data to and from every customer in the world. The entire thing is a giant, interconnected web of ISPs that work together to deliver data.


Question to search for:
What is ISP Hierarchy or internet hierarchy?

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