**IPv4 vs. IPv6 addresses** are two different types of addresses that belong to different Internet addressing standards. **IPv4** is an old standard, and the number of IPv4 addresses doesn’t meet people’s needs nowadays. However, the IPv4 format is widely accepted and won’t be abandoned in the near future. **IPv6** is a new format that can cover many more devices but isn’t supported by some Internet providers and websites.
**A public IP address** is a globally routable address that is used for communication between devices and websites on the Web. **A private IP address** can only be used in a local network.
**A dynamic IP address** gets assigned to a device when it goes online and may change over time. **A static IP address** stays unchanged as long as needed.