* Describe network communications using layered models

* Compare and contrast key characteristics of LAN environments

* Describe the components of network devices

* Evaluate rules for packet control

Welcome to the exciting world of internetworking. This first chapter will really help you understand the basics of internetworking by focusing on how to connect networks together using Cisco routers and switches. First, you need to know exactly what an internetwork is, right? You create an internetwork when you take two or more LANs or WANs and connect them via a router, and configure a logical network addressing scheme with a protocol such as IP.

I'll be covering these four topics in this ch ... read full excerpt from CCNA: Cisco Certified Network Associate Study Guide: Exam 640-801 ebook