Submarine Cables
Submarine cables are fiber-optic cables laid on the ocean floor to transmit data between continents, forming the backbone of global internet and telecommunications infrastructure. They carry over 99% of international data traffic, including internet, phone, and financial transactions, enabling high-speed, low-latency communication across vast distances. These cables are critical for connecting data centers, cloud services, and global networks, with modern systems using dense wavelength-division multiplexing (DWDM) to achieve terabit-per-second capacities.
Developers should learn about submarine cables when working on global-scale applications, distributed systems, or network infrastructure, as they directly impact latency, reliability, and data sovereignty in international services. Understanding their role is essential for optimizing content delivery networks (CDNs), cloud deployments, and real-time applications like video streaming or financial trading, where cross-continental data transfer speeds are crucial. Knowledge of cable routes and landing points can inform disaster recovery planning and compliance with data residency laws.