Understanding Public and Private IP Addresses
Understanding Public and Private IP Addresses 1. Introduction to IP Addresses An IP (Internet Protocol) address is a unique identifier assigned to every device connected to a network. It allows devices to communicate with each other , whether within a local network or across the global internet. IP addresses can be categorized into: Public IP addresses – accessible on the global internet. Private IP addresses – accessible only within a local network. Understanding the distinction is crucial for networking, cybersecurity, and efficient use of internet resources. 2. Public IP Address 2.1 Definition A public IP address is an IP assigned to a device or network that is visible and reachable from the Internet . It must be globally unique , ensuring that no two devices can share the same public IP at the same time. 2.2 Purpose Enables devices to communicate over the internet . Allows websites, servers, and services to identify and respond to requests from your network. 2.3 How It Wo...