What sets this CBT Nuggets course apart from dry technical manuals is the instructor himself. Jeremy Cioara is widely considered one of the most engaging teachers in the IT industry.
One of the steepest learning curves in iBGP is understanding the split-horizon rule, dictates that a route learned from an iBGP peer cannot be advertised to another iBGP peer. This requires a full mesh of peerings, which quickly becomes unmanageable as networks scale (
The 642-661 material covers the core logic of BGP that is still 100% applicable to today's production environments and current certification exams. Final Verdict What sets this CBT Nuggets course apart from
The Cisco 642-661 exam focused heavily on the design, implementation, and troubleshooting of BGP in service provider and large-scale corporate infrastructures. The CBT Nuggets course maps comprehensively to these demanding objectives, dividing the curriculum into distinct technical pillars:
Dividing a large AS into smaller, more manageable sub-ASs. This requires a full mesh of peerings, which
Breaking a massive Autonomous System down into smaller, sub-autonomous groups to minimize peering overhead. 3. Advanced Traffic Engineering: The BGP Attributes
For modern engineers, this CBT Nuggets archive remains an exceptional conceptual primer. It takes the intimidation factor out of BGP, laying down a bulletproof foundation before an engineer moves on to modern implementations like BGP EVPN or VxLAN. Breaking a massive Autonomous System down into smaller,
Although the 642-661 exam code belongs to the history books, the actual configuration syntax, architectural logic, and commands taught in this CBT Nuggets series have changed remarkably little. Cisco IOS commands like router bgp [AS] , neighbor [IP] remote-as , and clear ip bgp * remain universal standards.
Connecting on-premise data centers to the public cloud relies fundamentally on eBGP. Knowing how to leverage BGP communities and Local Preference remains standard practice for cloud network architects. Final Summary