Vector Network concept was widely popularized by Figma. We could see it in older graphics software like (https://www.xara.com/designerpro-plus/)[Xara]. Fairly talking — it is just a connected graph, and people were drawing graphs way before Figma appears.
Anyway, what Vector Network is:
Vector Network is a set of points connected by edges. Also it have got loops defined as a list of that above points. That is actually it.
Here is a simplest Vector Network implementation.
var p1 = new $1Point(40, 100);
var p2 = new $2Point(240, 100);
var p3 = new $3Point(80, 30);
var p4 = new $4Point(200, 180);
var points = [p1,p2,p3,p4];
points.forEach(point => {
R.circle(p, color, 3);
});