Almost same with a dial up connection system (new IP address assigned at each connection), a broadband connection (DSL connection) system makes our network IP address to be assigned dynamically. Therefore, it will be a big problem when we want to make a private web server in our house or a small email server in our office. Even though we can get a static IP, but it needs extra money for upgrading the DSL to a small business account.

Another possibility is to create ddns (dynamic domain name system) that enables a fixed domain names to be assigned to dynamic IP address. Besides that, a ddns can also be used to map a long URL to a new shorter domain name / sub-domain name, which called as URL forwarding service. more…