Undersea fiber optic cables laid along critical marine corridors such as the Strait of Hormuz and the Suez Canal form the backbone of the global internet infrastructure. These cables carry vast amounts of data across continents, linking countries and enabling digital communication worldwide [1].
Despite their importance, the system is fragile and difficult to defend. The 2022 volcanic eruption in Tonga severed undersea cables, causing a prolonged internet outage for the island nation [1]. This event highlighted the vulnerability of global connectivity to natural disasters impacting these underwater networks.
The global internet infrastructure relying on these cables closely resembles an old telegraph cable network from a bygone era. "The system in place right now is pretty old school and resembles the telegraph cable network of yore," said journalist Samanth Subramanian [1]. He also noted, "The internet is not, and has never been, truly weightless or wireless," emphasizing the physical and tangible nature of internet connectivity hidden beneath oceans [1].
The combination of geographic constraints, environmental risks, and the aging nature of cable networks poses ongoing challenges to securing reliable international data flows. Experts stress the need for ongoing maintenance and strategic routing to mitigate disruptions.
Efforts to protect and modernize the undersea cable system will be critical as reliance on global internet access continues to grow. Networks operators and governments monitor vulnerabilities closely, given the cables’ vital role in global communications.
The next major milestone includes planned cable upgrades and new routes intended to increase redundancy and resilience, set for deployment over the next few years.
