September 2008
Beginner
456 pages
11h 41m
English
Content preview from Sams Teach Yourself TCP/IP in 24 Hours, Fourth 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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Higher in the Stack
Hardware and software have gradually become much more sophisticated since the appearance of the first routers. Several years ago, hardware vendors began to notice the benefits of forwarding and filtering at higher levels of the protocol stack.
As you learned in Hours 2 through 7, each layer of the stack offers different services and encodes different information in its header. A router with access to higher layers of the stack has additional information on which to base its decisions. For instance, a router that sees the Transport layer could form inferences on the nature of the data based on knowledge of the source and destination port. A router that sees the Application layer would have even more complete knowledge of the ...
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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.