Dns (Domain Name System)

In: Computers and Technology

Submitted By sheunalabi
Words 2847
Pages 12
Domain Name System
Proper use reduces intranet administration costs

Architecture
Flexible Scalable Extensible

Service
Standard Robust Efficient

DNS
Affordable Reliable Predictable

The Internet continues expanding. Its progress seems unstoppable; for years now the rate of growth has been increasing. To easily continue using a more widely spread Internet, and to keep a grip on it, DNS is vital. This article explains the benefit of DNS for business networks and the technological and administrative conditions necessary for the optimal deployment of this technology. The method described here is particularly important for organizations with many employees spread over multiple locations.

Domain Name System
Proper use reduces intranet administration costs

N

etwork addresses, such as 192.68.44.134, are difficult for people to remember. The need for associating names with network addresses has been recognized almost from the start of the Internet. Initially, a list of the names and network addresses of all computer systems was maintained in a central file, known as the hosts file. System administrators needed the discipline to regularly pick up the latest version. This method of working was no longer practical once the Internet starting rapidly expanding. System administrators needed to pick up an increasingly large file increasingly often. Also, the whole Internet was dependent on a single central authority who made changes. This authority also had no way of verifying changes.

By about 1983 it was clear that the hosts file had to be replaced by another mechanism. The successor had to offer the same functions, but also be distributed, consistent, reliable, and autonomous. These four characteristics are brought together in DNS. 1. Distributed: the system is hierarchical and allows the delegation of authorities to multiple administrators. 2. Consistent:…...

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