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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Subnets
An IP address must identify both the host and the network where that host resides. As you learned in Hour 4, “The Internet Layer,” the IP address class system gives a clue for how to distinguish the network and host portion of the address. But the address class system is too inflexible to do the job alone. In the real world, networks come in all sizes, and many networks are divided into smaller units. Furthermore, the world is running out of class-level networks. ISPs and network admins need a flexible means for subdividing a class-level network so that datagrams arrive at routers serving a smaller address space.
Subnetting lets you break the network into smaller units called subnets. The concept of a subnet originally evolved around ...
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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.