Intermediate
Computer Networks
Q71 / 100
What problem does the count-to-infinity issue cause in distance-vector routing, and how is it mitigated?
Correct! Well done.
Incorrect.
The correct answer is D) Routers can loop, slowly incrementing a route's hop count toward infinity after a link fails; mitigated with techniques like split horizon, route poisoning, and hold-down timers
D
Correct Answer
Routers can loop, slowly incrementing a route's hop count toward infinity after a link fails; mitigated with techniques like split horizon, route poisoning, and hold-down timers
Explanation
When a route disappears, distance-vector routers may keep advertising stale routes to each other, incrementing the metric each time. Split horizon (don't advertise a route back to where it came from) and route poisoning (advertise a failed route with infinite metric) prevent these loops.
Progress
71/100