September 2018
Intermediate to advanced
426 pages
10h 46m
English
Content preview from Mastering Python for Networking and Security
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DNS protocol
DNS stands for Domain Name Server, the domain name service used to link IP addresses with domain names. DNS is a globally-distributed database of mappings between hostnames and IP addresses. It is an open and hierarchical system with many organizations choosing to run their own DNS servers.
The DNS protocol is used for different purposes. The most common are:
- Names resolution: Given the complete name of a host, it can obtain its IP address.
- Reverse address resolution: It is the reverse mechanism to the previous one. It can, given an IP address, obtain the name associated with it.
- Mail servers resolution: Given a mail server domain name (for example, gmail.com), it can obtain the server through which communication is performed ...
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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.
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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.