Illustration "

In my opinion, the wordings gets mixed up too easily- a social network by definition of wikipedia is simply "A social network is a social structure made up of a set of social actors"- means, our grandmothers with her neighbors in the village form a social network as well- far away from internet and social media.

But nevertheless, there is great picture out there in internet showing a link between vintage and modern methods of networking (although the picture itself does not illustrate any network itself- that's another example of unclear usage of language)

http://www.educatorstechnology.com/2013/06/awesome-graphic-on-traditional-vs.html