Jump to content
  • Advertisement


This topic is now archived and is closed to further replies.


What is the advantage that two hosts map to the same IP address?

This topic is 5777 days old which is more than the 365 day threshold we allow for new replies. Please post a new topic.

If you intended to correct an error in the post then please contact us.

Recommended Posts

There is a limited amount of IP adresses, and (nearly) unlimited supply of hostnames. A company leases IP address ranges, and they are not cheap.

The most common use of this is virtual hosts on web servers, where you can point several domain to a single computer/IP and let the HTTP server select the correct "virtual host" for that request. It would be pretty expensive for a hosting company to need an individual IP address for every of the 20.000 web sites they host. This does not work with SSL (https) though, as the host information is encrypted.

The other reason is scalability. Even if you have mail.domain.tld, www.domain.tld, intranet.domain.tld, ftp.domain.tld all running on the same computer now, you can move any of these to another computer (with another IP) without the user of the service have to change anything. Just a simple DNS editing is needed.

EDIT: Another way of looking at it, is to compare with phone numbers. One phone number is, of course, cheaper than more. So, instead of having a single host on each number, they have several at each. When the phone rings, a secretary asks who the client wants to talk to, and hand it over. This also makes it more flexible. And, as this is transparent to the end user, it doesn't look bad nor is annoying, as it would in the real world.

[edited by - CWizard on January 22, 2003 9:31:12 PM]

Share this post

Link to post
Share on other sites

  • Advertisement

Important Information

By using GameDev.net, you agree to our community Guidelines, Terms of Use, and Privacy Policy.

We are the game development community.

Whether you are an indie, hobbyist, AAA developer, or just trying to learn, GameDev.net is the place for you to learn, share, and connect with the games industry. Learn more About Us or sign up!

Sign me up!