December 2011
Beginner
552 pages
13h 30m
English
Content preview from Network Security First-Step, Second EditionBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Analogy: VPNs Securely Connect IsLANds
Your network (LAN) is an island of sanity, order, and user services in an unpredictable ocean known as the Internet. You know thousands of other islands exist within this ocean; when you want to travel from island to island, you would hop on a ferry and travel to the next island that just also happens to be that website or the latest smartphone you had your eye on.
Now, you are on this ferry (using TCP/IP) traveling over the ocean (Internet) to reach something on an island (LAN) that is going to provide you with some sort of service (website). This makes perfect sense, right? Now, how many other people do you see on that ferry—perhaps a few, or perhaps many thousands? The potential problem is that you have ...
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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.