Internetworking Basics

Before I explore internetworking models and the specifications of the OSI reference model, you have to understand the big picture and learn the answer to this key question: why is it so important to learn Cisco internetworking?

Networks and networking have grown exponentially over the past 15 years—understandably so. They've had to evolve at light speed just to keep up with huge increases in basic, mission-critical user needs, such as sharing data and printers, as well as more advanced demands, such as videoconferencing. Unless everyone who needs to share network resources is located in the same office area (an increasingly uncommon situation), the challenge is to connect the relevant networks so all users can share the ...

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