What Is BGP ?

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Before we explain BGP, we will start with the Autonomous System and Dynamic Routing Protocol. Then, it will be easy to understand the concept of BGP.

What is an Autonomous System?

An Autonomous System (AS) is a collection of network devices, such as routers, managed by a single organization. Its main role is to control the flow of data within its network and how it connects to other networks on the internet.

When multiple routers in the same local area (like inside a company) are connected, they share data with each other. Once this data is shared and the routers work together, they form a group. This group is what we call an Autonomous System.


What is the Dynamic Routing Protocol?

A Dynamic Routing Protocol is a method used by routers to automatically find the best path for data to travel across a network. It helps routers adjust routes when the network changes, without needing someone to set them manually.

There are 2 types of Dynamic Routing Protocols,

  • IGP (Interior Gateway Protocols) - When multiple routers are part of the same local domain or internal network, they use a special kind of protocol called Interior Gateway Protocol (IGP) to communicate. This allows them to share information and direct traffic efficiently within the network. An internal network like this is also known as a single autonomous system (AS).

  • EGP (Exterior Gateway Protocols) - Exterior Gateway Protocols (EGPs) share routing information between different networks called autonomous systems (ASes) on the Internet. EGPs help these networks communicate and find the best paths for data to travel, especially when networks from different organizations connect.


So What is BGP?

Border Gateway Protocol (BGP) is a system that helps decide the best path for data to travel on the internet, similar to how the postal service finds the fastest way to deliver mail. It links different networks, called autonomous systems (AS), by sharing route information. This allows data to flow smoothly between networks, making the internet work properly through a process called peering.

  • If you want to learn more about this topic, you can easily visit this link for more details. It provides useful information that can help you understand better. Don't hesitate to check it out! Learn More

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