When you send a request across the internet, it crosses multiple organizations. Each organization runs its own network, yet your packet finds its way. This happens because of inter-domain routing.
I'll show you how BGP (Border Gateway Protocol) makes this work. You'll learn:
- Why routing inside and outside an organization differs
- What Autonomous Systems are and how they're numbered
- How BGP routers share path information
- The attributes that influence route selection
- How organizations control their traffic flow
Without BGP knowledge, you can't troubleshoot global routing issues or design networks that connect to multiple providers.