Question : AD Sites And Services Subnets Just for DCs?

I added a new site to my AD Sites and Services. I was wondering if i need to add all the subnets of a site or just the subnet in which the Domain Controllers will be on?

ex. 192.168.1.0 site A dcs are located
192.168.3.0 site A user computers
192.168.10.0 site b dcs are located

do i need to create the 192.168.3.0 subnet in AD sites and services?

Answer : AD Sites And Services Subnets Just for DCs?

An AD Site is defined by the one or more Subnets that are part of it.

So the Sites needs the subnet objects,...

Anything that needs/uses the Sites Object,...then by nature, needs the Subnet Objects

Exchange2007 and Exchange2010 use the AS Sites & Services in place of what used to be the Exchange Routing Groups.

So,...it is more than just DC that use them.