Mirror
A mirror orbits the sun and reflects light to a receiver.
It has neighbours. They are close enough to message each other. They are an internet.
They all have the same distance from the sun.
A full swarm catching all the light of the sun would have an area of S = 4πr2
r=4E10m
so S = 2E22m2
and if each mirror is 1E62 then a full swarm has 2E16 mirrors which is 20 quadrillion mirrors. If they are overlapping circles then there's 30 quadrillion.
A 1% swarm at an orbit of 40 million km is 2E14 mirrors. 200 trillion mirrors.
Ten years is 3.1536E8 seconds which is 634 mirrors a second. Nearly all of those are in the final year.
Before the final year a single railgun is enough with 30 launches a second.
The orbit distance of a mirror around the sun is 2πr =