Centrality and centrality measures
A highly centralized network is dominated by one person who controls information flow. A less centralized network has no single point of failure. People can still pass on information even if some communication channels are blocked.
Analyst's Notebook calculates betweenness, closeness, degree, and eigenvector centrality measures to provide different perspectives on the social relationships within the network. You can also influence the centrality measures by taking into account the direction of links and the weightings that are applied to them.