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[>_] ROOM · Networking
BGP Fundamentals
Master the Border Gateway Protocol (BGP). Learn Autonomous Systems, eBGP vs. iBGP, path attributes, and neighbor configuration.
Room tasks
1What Is BGP and Why Does It Matter
2eBGP vs iBGP
3BGP Path Attributes & Best Path Selection
4Route Filtering with Prefix Lists & Route Maps
5Guided Lab: Configuring eBGP Peering Between Two Autonomous Systems
Frequently Asked Questions
What is BGP?
The Border Gateway Protocol exchanges routing information between autonomous systems and underpins how the internet is stitched together. Networks use it to announce which IP ranges they hold.
What is the difference between eBGP and iBGP?
eBGP runs between different autonomous systems, while iBGP runs inside one. They follow different rules for attributes and loop prevention.
Why is BGP a security concern?
BGP trusts announcements by default, so mistakes or hijacks can redirect traffic. This free beginner Codelivly room covers the fundamentals you need to understand those risks.