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* Do you know what BGP (Border Gateway Protocol) is?


Suggested article: Understanding BGP: A Comprehensive Guide for Beginners

BGP (Border Gateway Protocol) is the system that guides data across the Internet, similar to how a postal service determines the best route for mail delivery. It allows different networks, known as Autonomous Systems (AS), to communicate and share routing information, ensuring that data packets reach their correct destination efficiently.

BGP relies on several key attributes to make routing decisions:

  • AS Path: This shows the sequence of networks data must traverse, with shorter paths generally preferred.
  • Next Hop: Indicates the next router to forward data to, ensuring the correct route is followed.
  • Local Preference: Used within an AS to prioritise one exit point over others when multiple routes are available.
  • Multi-Exit Discriminator (MED: Helps an AS influence another AS's choice of entry points when multiple options exist.

BGP operates over TCP using port 179, which is crucial for establishing reliable sessions between BGP routers. It ensures stable communication and accurate routing across the Internet, which is essential for the seamless flow of data.

In case you desire to find more details about this topic, we suggest the following page explaining BGP (Border Gateway Protocol) in detail!