April 2017
Beginner
504 pages
14h 11m
English
Content preview from Java 9 Programming By Example
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DNS
The TCP protocol creates a channel using the IP addresses of machines. When you type a URL in the browser, it usually does not contain IP numbers. It contains machine names. The name is converted to IP numbers using a distributed database called Domain Name System (DNS). This database is distributed, and when a program needs to convert a name to an address, it sends DNS request to one of the DNS servers it knows. These servers query each other or tell the client whom to ask, until the client knows the IP address assigned to the name. The servers and the client also cache the recently requested names, so answering is fast. On the other hand, when the IP address of a server changes this name, not all clients will immediately see the address ...
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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.