Surf the Web Waves: Master Khan Academy's Internet Practice Test 2026!

Allowing each router to pick a next hop that is currently reachable lets the network adapt to failures by dynamically rerouting around outages. When a link or node fails, that router can choose a different neighbor that still progresses toward the destination, so traffic keeps flowing even as conditions change. This decentralized, up-to-date decision-making provides fault tolerance because there are multiple viable paths and routers can switch to whichever one is working now. The other ideas would lock in a single path, flood the network with duplicate packets, or wait for everyone to fail before changing, which either wastes resources or leaves traffic unprotected against outages.