If you have a device on your network, such as a security camera or even a server that you want to access remotely, this can be difficult without a static IP address. An IP address is a number assigned to each device on a network that uses the internet. For most home users with residential internet service, this number can change periodically. When that number changes, it is referred to as a Dynamic IP address. It's possible, however, to pay more to get a Static IP address, which doesn't change. When the address is static, it's much easier to access devices and servers remotely.