This podcast is made by Ran Chen, who holds an EA license, Insurance and Securities licenses (Series 6, 63, 65), and the CFP® designation. He is passionate about opening access to high-quality exam preparation resources and helping learners prepare more effectively for professional certification exams.

In this episode you will learn:

- A host uses its default gateway only when the destination IP address is on a different subnet.

- The IP header's Time-to-Live (TTL) field is a last-resort mechanism that prevents packets from looping infinitely.

- Split Horizon is a loop prevention rule where a router avoids advertising a route back to the neighbor from which it was learned.

- Poison Reverse actively prevents loops by advertising a failed route with an infinite metric back to the source router.

- An ICMP redirect message is sent by a router to inform a host on the same subnet of a more optimal first-hop router for a specific destination.

For more free exam prep tools, practice questions, and AI-powered explanations, visit https://open-exam-prep.com/ or YouTube Channel: https://www.youtube.com/@Open-exam-prep