Easy_yan: February 2009

DNS (Domain Name System)

Intro :

DNS is a hierarchical naming system for computers, services, or any resource participating in the Internet.
It associates various information with domain names assigned to such participants. Most importantly, it translates domain names meaningful to humans into the numerical (binary) identifiers associated with networking equipment for the purpose of locating and addressing these devices world-wide.
For example, www.apeape.com translates to 208.77.188.166.
Domain name services resolves names to the ipaddresses of clients and vice verse. Domain name system provides a convenient way of finding computer systems in network based on its name and ip address . With increased internet usage and globalization of companies setting up of dns servers has become a major responsibility of system administarators worldwide
Domain name system is a hierarchical system where we have a top level domain serving sub domain and clients with names & ip address
The system that runs the name services to resolve names into ipaddresses is called name server and the sofware is generally BIND (Berkley Internet Domain)
Each of domain or sub domain have information about its clients and is called authorative for these clients. For other clients for which it doesn't have any information or it is not authorative, it passes query to its higher domain

DNS (Sistem Penamaan Domain)

Intro :

Sistem yang simpan maklumat tentang nama host/nama domain dalam bentuk pengagihan database (distributed database)
Distributed database tadi digunakan untuk pencarian nama komputer di dalam internet yang menggunakan TCP/IP
Sediakan alamat IP untuk setiap nama host dan merekodkan setiap "mail exchange server" yang menerima email untuk setiap domain.
cth: web browser/emal yang diterjemahkan kpd sebuah domain ke alamat IP. www.apeape.com boleh juga dibaca sebagai 208.77.188.166

Fungsi DNS:

Easy_yan