Static and Dynamic IP Addresses
Last Updated: Fri, 22 Apr 2011 > Related Articles
Learn the difference between a static and a dynamic IP address.
A static IP address is an address that is assigned to you usually by your ISP. Static addresses generally never change unless there is a need for it, such as a network or routing change. Typically, your static IP does not change.
A dynamic IP address can change at any time. Each time you boot your computer and get on the Internet, a new IP address is assigned to you. Most ISP will 'lease' you the dynamic IP address for 24 hours. Once you disconnect from the internet, the IP you were using is placed into a pool of IP's and reassigned as needed. You may get the same IP next time you connect to the internet, but it is not guaranteed.
When you do NOT need static IP addresses:
- If you browse the Internet.
- If you send and receive e-mail via an offsite server (the normal method).
- If you download or upload files.
- If you use Instant message services or chat services.
When you need Static IP Addresses
- You run one or more Web servers directly on your site that require external access.
- You run one or more E-mail servers directly on your site that require external access.
- You run one or more FTP servers directly on your site that require external access.
- You allow 'incoming' Video Conferencing.