AWS fiber optic cable cut

AWS designs its global fiber optic network with multiple redundant pathways to minimize service disruptions from cable cuts or failures.AWS Network RedundancyAWS operates a vast global network spanning 38 regions and 120 availability zones, connected through multiple redundant fiber optic routes, including subsea cables across major oceanic corridors . This design ensures that if a fiber optic cable is cut or experiences an outage, traffic can be rerouted through alternative pathways, maintaining service continuity for cloud and AI workloads . AWS regularly reviews its network topology to identify vulnerabilities and strategically adds new routes to prevent single points of failure .Fastnet Transatlantic CableTo further enhance resilience, AWS is building Fastnet, a dedicated transatlantic subsea cable connecting Maryland, U.S., and County Cork, Ireland, expected to be operational in 2028 . Fastnet is designed with two strategic landing points and advanced optical switching technology, allowing data to be rerouted seamlessly if other cables fail . With a capacity exceeding 320 terabits per second, it provides significant redundancy and supports growing AI and cloud computing demands . The cable's robust construction, including protective steel armoring in nearshore areas, is intended to withstand natural and human-related hazards .Impact of a Cable CutWhile a fiber optic cable cut can temporarily affect data transmission along that specific route, AWS's multi-layered redundancy and diverse routing minimize the impact on customers. Services like Amazon CloudFront, AWS Global Accelerator, and AI workloads can continue operating by automatically rerouting traffic through other cables or network paths . AWS also integrates real-time traffic monitoring and optimization systems to prevent congestion and maintain low latency even during disruptions .Security and ReliabilityAWS ensures that all data transmitted across its fiber network is encrypted in transit, and physical security measures protect cables and network devices . This combination of redundancy, monitoring, and encryption provides both high availability and data protection, even in the event of a cable cut or other network incident . In summary, while fiber optic cable cuts can occur, AWS's global network architecture, including projects like Fastnet, is specifically designed to maintain uninterrupted cloud services and rapidly reroute data to mitigate the effects of such incidents.