Certified Information Systems Security Professional. Student Guide

Networking has grown exponentially from its first inception to today’s Internet which is nothing more than a vast network spanning all nations in every pan of the globe. The Internet connects individuals, groups, corporations, universities, and governments in a way that is both very simplistic and very open. The Internet is an information exchange using a common infrastructure, protocols, and applications. The same is true of the individual entities that comprise the Internet. Yet, where the Internet is an open network, the individual enterprises that comprise it choose not to be open.