Q23

Consider the following three statements about link state and distance vector routing protocols, for a large network with $500$ network nodes and $4000$ links. [S1]: The computational overhead in link state protocols is higher than in distance vector protocols. [S2]: A distance vector protocol (with split horizon) avoids persistent routing loops, but not a link state protocol. [S3]: After a topology change, a link state protocol will converge faster than a distance vector protocol. Which one of the following is correct about $S1$, $S2$, and $S3$?