What is DNS
Zac Bickersteth on October 24, 2010 in Courses SectionDNS (Domain Name System) is the system that translates an Internet name (that is easier for people to remember) to an IP address. A Domain Name could be for example http://www.networkstraining.com that the DNS translates to an IP address (74.54.219.242). If the address is registered in a reverse lookup zone, the IP address is translated back to the DNS name and it is called “reverse DNS lookup” or simply r-DNS.
A DNS system consists of two parts: a server and a resolver. The server keeps information about which DNS names correspond to which IP addresses. A Resolver is the software on the DNS client who is asking the server for information.
A DNS name consists of a host (e.g www means it is a webserver) and domain (e.g networkstraining.com). Domains are unique and are recorded in global databases.
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