Shortest paths - shortest distance between two nodes. For example the shortest path from Lenore to Mary is through Rupert and not through Chris and Jessica.
Weight - strength of the tie represented by the thickness of the edges between nodes. In the example below, the edge between Lenore and Bob Chris is the strongest.
Directionality - is the connection one-way or two-way? In the example below, and in most directed networks, directionality is indicated by arrows.
In-degree - is calculated by determining the number of edges that point to a node, for example Bob Chris has an in-degree of 3 and Doug Rupert only has an in-degree of 1
Out-degree - is calculated by determining the number of edges that point away from a node, for example Bob Chris has an out-degree of 1 and Doug Rupert has an out-degree of 3.