Question

____ routing involves broadcasting ____ for routing.

(a) Proactive, search packets

(b) Reactive, search packets

(c) Proactive, routing table

(d) Reactive, routing table

I got this question during a job interview.

My doubt is from Available Technologies for Cognitive Radio topic in section Cognitive Radio Basics of Cognitive Radio

Answer 1

Right option is (b) Reactive, search packets

Best explanation: Reactive routing involves broadcasting search packets which returns one or more paths to the destination node and returns that path to the source node. Proactive routing does involve the maintenance of a routing table to forward a node in the direction likely to reach the destination, however this table is not broadcasted.