Commentary: What would happen if the internet went down?

The internet is not a single, easily switchable technology, but rather a vast network of interconnected computers and devices supporting various services. These services rely on network infrastructure and data exchange between devices to function. For instance, when accessing a website hosted on a server, data travels between the user's device and the server through network connections.

These connections may involve physical cables, wireless links, or satellites. While losing access to one system doesn't necessarily mean losing access to others, shared dependencies can pose risks. For example, using the same Google or Microsoft account to access multiple services could lead to widespread disruption if the shared sign-in system fails.

While a complete internet blackout is unlikely due to its underlying infrastructure, interruptions to specific services are plausible and likely to increase. Such disruptions could range from minor inconveniences to prolonged crises, depending on which shared systems fail and the availability of alternatives. The impact of an outage depends on which shared systems fail and whether viable alternatives exist.

To mitigate risks, organizations and individuals must plan ahead. This includes developing well-prepared incident response plans with clear criteria for isolating systems or taking services offline, as well as arranging for essential operations to continue. For users, preparation involves identifying critical services and ensuring access to essential information, such as contact numbers, documents, and payment methods, even without an internet connection.

By anticipating potential issues and planning accordingly, the internet's reliance on shared dependencies can be managed more effectively, reducing the risk of widespread disruptions and ensuring resilience in the face of cyber threats.