IPv4
IPv4 (Internet Protocol version 4) is a core networking protocol that provides logical addressing for devices on a network, enabling data packet routing across the internet and local networks. It uses 32-bit addresses, typically expressed in dotted-decimal notation (e.g., 192.168.1.1), to uniquely identify each device and facilitate communication between them.
Developers should learn IPv4 because it is fundamental for understanding network communication, troubleshooting connectivity issues, and configuring network settings in applications, servers, and devices. It is essential for tasks like setting up web servers, implementing network security, and working with cloud infrastructure, as most legacy systems and many current networks still rely on IPv4 addressing.