An IP address is a unique number assigned to every device that connects to a network. It works like a mailing address, allowing data to travel to and from your device across the internet. Each device, whether a computer, phone, or router, needs one to send and receive information. IP addresses come in two formats: IPv4, written as four numbers separated by dots, and IPv6, a longer format using letters and colons. Your internet provider assigns your device a public IP address, which represents your entire home network to the outside world. Devices inside your home network also get private IP addresses, used only for local communication between devices like your laptop, phone, and printer.

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