Wi-Fi 4
Wi-Fi 4 is the marketing name for the IEEE 802.11n wireless networking standard, which was introduced in 2009 to significantly improve Wi-Fi performance over previous versions. It operates in both the 2.4 GHz and 5 GHz frequency bands, supports multiple-input multiple-output (MIMO) technology for increased data throughput and range, and offers theoretical maximum speeds up to 600 Mbps. This standard is widely used in home and office networks, providing reliable connectivity for devices like smartphones, laptops, and smart home gadgets.
Developers should learn about Wi-Fi 4 when working on network-dependent applications, IoT projects, or optimizing wireless performance in software, as it represents a foundational technology in modern Wi-Fi ecosystems. It is particularly relevant for scenarios requiring backward compatibility with older devices, cost-effective networking solutions, or understanding legacy systems in enterprise or consumer environments. Knowledge of Wi-Fi 4 helps in troubleshooting connectivity issues and designing systems that leverage its MIMO capabilities for improved data transfer.