The correct answer is option 3.Non-Adaptive Routing Algorithm: These algorithms do not base their routing decisions on measurements and estimates of the current traffic and topology.Instead, the route to be taken in going from one node to the other is computed in advance, off-line, and downloaded to the routers when the network is booted.This is also known as static routing. This can be further classified as, Flooding, Random Walk.? Hence the correct answer is Non-adaptive algorithms.Additional InformationRouting algorithms classified into two types, Adaptive routing algorithms, and Non-Adaptive routing algorithms.Adaptive Routing Algorithm: These algorithms adjust their routing decisions in response to changes in the network topology and traffic. These obtain routing information from neighboring routers or from all routers. The size, number of hops, and approximate transit time are the optimization parameters. This can be further divided into the following categories: Centralized, Isolated, Distributed.