March 2026
Intermediate to advanced
400 pages
15h 45m
English
Content preview from WIRELESS & MOBILE DEVICE SECURITY Third Edition, 3rd Edition
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Introduction to Cellular (Mobile Communication)
One of the greatest accomplishments of the 20th century was the rollout of the public switched telephone network (PSTN)—not only because of the technology itself but also because of its ubiquitous reach. With the PSTN, nearly every home in the developed world (and a high percentage of homes in some undeveloped areas) had a wired communication channel that connected it to the rest of the world, providing a lifeline in times of trouble. The system even provided its own power, keeping the communication channel open when the lights went out. Just imagine the scope and cost of running and maintaining a wired connection in the United States alone, with approximately 125 million homes and 20 million ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.