What would you do if you could "see" an entire subnetwork's worth of IP addresses in your head? It's not science fiction; it's a four-step recall method. Subnetting in your head can help you diagnose network topology issues faster, pass IT certifications, and stand apart from the competition in a crowded job market. In this course, Bill Ferguson reveals the secrets to determining IP ranges and broadcast addresses without the use of subnet calculators or any binary translation.