Internet protocol (IP) address, a unique number much like your street address that uses commas and periods to identify a device accessing the internet. Your personal desktop, laptop, tablet, and smartphone each have a different IP address each time you log on. Each of your business devices may have its own static address that doesn’t change. See domain name system (DNS).

The 3 Things To Avoid When Emailing Your List
When you decide to have an opt-in list, it is not just a matter of sending your subscribers your promotional newsletters or catalogs.