This is the crucial question. The 642-661 exam is retired. Cisco replaced it with CCNP Service Provider tracks (SPROUTE, 642-883, etc.). However, the content remains historically and practically relevant for three reasons:

CBT Nuggets - Cisco CCIP BGP (642-661) is a masterclass in networking instruction. While you should not use it as your only study material for a 2024/2025 certification exam, it is an exceptional resource for learning the fundamental mechanics of BGP. Jeremy Cioara’s ability to simplify complex topics makes this series a "watch list" essential for any network engineer looking to master routing.

If you locate a copy of the CBT.Nuggets.-.Cisco.CCIP.BGP..642-661 collection, you will typically find between 20 and 30 video modules. Here is a typical syllabus breakdown based on the original release:

Before the era of whiteboard animations, before CML and DevNet sandboxes, there was a digital oasis for networking students staring down the barrel of Cisco’s CCIE track. That oasis was CBT Nuggets, and its high priest was Jeremy Cioara.

For anyone who studied for the Cisco CCIP (Cisco Certified Internetwork Professional) exam 642-661—officially titled Configuring BGP on Cisco Routers—the name alone triggers a specific kind of muscle memory. It wasn't just a video series. It was a four-to-six-week boot camp for the soul.