Submarine cables are undersea cables that carry telecommunications signals across oceans and seas. They are essential for global internet connectivity, enabling data transmission between continents. These cables are laid on the ocean floor and can stretch thousands of miles, connecting countries and regions. The cables consist of multiple layers, including a core of optical fibers that transmit data using light signals. Protective layers shield the fibers from water, pressure, and physical damage. Submarine cables are crucial for modern communication, supporting services like internet, phone calls, and streaming media.