Why BGP tracks the exact path (hop-by-hop through AS numbers) rather than individual routers to guarantee a loop-free internet.
Mastering BGP: A Review of CBT Nuggets Cisco CCIP BGP (642-661) with Jeremy Cioara Why BGP tracks the exact path (hop-by-hop through
While the specific 642-661 exam code belongs to Cisco's certification history, the knowledge contained in this CBT Nuggets series is entirely evergreen. BGP remains the protocol that controls global internet routing, large-scale SD-WAN architectures, and cloud connectivity frameworks (such as AWS Direct Connect and Azure ExpressRoute). large-scale SD-WAN architectures