IP addresses are very similar to phone numbers. They are used to identify a computer like a phone number is used to identify a cellular device or even a home. The difference between a Dynamic IP Address and a Static IP Address is that a dynamic IP Address changes each time you use it while a Static IP Address remains the same each and every time the Internet is utilized.
Static = Same
Dynamic = Different
Who Uses Which IP Address and Why?
Most of the time private sector or residential Internet connections are given Dynamic IP Addresses while commercial Internet connections receive either a Dynamic IP Address or a Static IP Addresses. There are situations where this just the opposite, but that does not happen very often.
For almost all residential Internet users, having a dynamic IP Address is really no big deal because we do not run servers, and massive webpages, or financial institutions like large corporations do. Those types of business need a static IP address to help with security, and for customers, employees, etc. to find their site faster.
The reason that we have both dynamic and static IP Addresses is that the number of IP addresses available is limited. Because residential Internet users are not connected to the Internet 24 hours a day, seven days per week, they can share a pool of dynamic IP Addresses among a larger number of users. Businesses that run on a 24 hour time clock utilize the same IP address because they are always online, or their servers are always online. Even if, your computer is always online, you will still most likely have a Dynamic IP Address. Some businesses require a static IP address so that online clients and customers can not only find them but send secure documents, make monetary transactions and perform other secure actions.
Can You Get A Static IP Address?
The answer is yes, but you have to petition your Internet Service Provider for it. These types of Internet Addresses usually cost more and are very rarely granted to non-business customers.