Cisco's Hierarchical Network Design Model -- Cisco no longer lists HDM as a CCNA exam topic. This tutorial covers everything you need to know about Cisco's Hierarchical Network Design Model for the CCNA exam as well as provides a solid foundation of understanding for the more advanced exams. This tutorial covers what the Hierarchical Network Design Model is, the layers of the model, Cisco network equipment you can expect to find in each layer, and some tips on remembering it all. Become a ZONE Subscriber and gain access to all Study Guides Author: Marc Menninger Technical Level: CCNA™ and CCNP™ Date of Issue: 09-15-2001 Rating:   4 of 5    Table of Contents  Tutorial  3 Sample Study Questions  20 Study Questions Return to Study Guides