Introduction To DNS (Domain Name Services)

Info
Level: Beginner
Presenter: Eli the Computer Guy
Date Created: March 13, 2013
Length of Class: 19:17
Tracks
Servers
Networking
Prerequisites
Introduction to Networking
Purpose of Class
This class teaches students the basic concepts for network DNS (Domain Name Services).

Class Notes
DNS is the Server Service that Maps Hostnames/ Domain Names to IP Addresses
DNS and DHCP are different services that are generally hosted on the same server, but can be hosted on separate servers
Dynamic DNS allows DHCP to automatically add Name and IP Address mapping to DNS tables.
Most techs will work with DNS built into Small Business/ Home Routers or ISP Modems. Other variations of DNS are provided by Windows Servers or BIND which is used on Unix and Linux servers.
A DNS implementation may be very simple or very complex. BIND and Windows DNS can have many configurations and options while DNS built into a Linksys Router will only have an On/ Off toggle.
DNS Servers can be configured to query other DNS Servers if they cannot find a result in their tables.
Reverse DNS maps IP Addresses to Hostnames/ Doman Names. This is done for security to verify a connection has not been redirected by hackers.
Resources
https://www.isc.org/software/bind
http://en.wikipedia.org/wiki/Domain_Name_System

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