The RFP is (should be) a public document that sets out broad parameters about what the buyer - a county in this case, theoretically answerable to its citizens - is seeking, although specific technical details can be kept private for various reasons. For example, the client may ask for 2 network pathways between a site and controller, or a mesh network, whatever. But the client may not want to specifically describe their existing network architecture / facilities in a RFP for security reasons - which is reasonable. Then we get into NDAs that both the client and bidders might sign to keep proprietary designs private - but that stuff is beyond the scope of an RFP.