How to identify a network node that connects more connected subgraphs

Question

I've created a network graph, visualized below.

I'm looking for a way to formally identify nodes like the one I've circled. It connects two otherwise more strongly connected sections of the graph.

Can anyone recommend some concepts or associated igraph functions that would set me in the right direction? I'm new to network analysis and still lack much of the vocabulary.

Answer 1

Use articulation_points() and look up biconnected components.