CCNA Exam Prep 42, Default Gateway and Routing Loop Prevention

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