Link weightings
Not all relationships in a network are equal. For example, the link between two people, that are connected through a family relationship might be stronger than a link between two business associates.
These links can be weighted so that they represent real-world strengths in social network analysis. Weighting key paths in the network might also infer that the entities by using them to channel information have key roles to play. For this reason, centrality measure results are affected by link weightings.