E-Cycles and Render Farm's --- Do all computers need E-cycles?

Not having any experience with E-cycles and very little with a home built server farm, sorry if this is obvious.

If i have E-cycles installed on my main computer which will be used to make my scene/project and then use a small home build server farm to render (animations), do all computers need E-cycles installed ?

I understand if the computers on the farm do not have E-cycles they will be slower, im not concerned about that, i would like to know if there will be a compatibility issue or something like that ?

When using E-cycles do you use all of Blenders shaders (un-like Octane from what ive read) ?

Thanks for any guidanceā€¦