4G and 5G are generations of mobile network technology that provide faster internet speeds and improved connectivity. 4G offers download speeds up to 100 Mbps, enabling smooth video streaming and online gaming. It uses advanced technologies like LTE (Long-Term Evolution) to enhance performance and reduce latency. 5G is the latest advancement, promising speeds up to 10 Gbps, which is significantly faster than 4G. This technology supports a larger number of devices simultaneously, making it ideal for smart cities and the Internet of Things (IoT). 5G also reduces latency, allowing for real-time communication in applications like autonomous vehicles and remote surgery.