What's the difference between ADO and ADODB?

ado .net is disconnected architecture

ado is partial disconnected architecture

ado doesnt support  constraints,ado.net supports

ado data is transferred to ADTG(active data table gram )format .it is a network based format.tranismission is not possible between hetrogenious platforms.

using the ado.net transimission is possible in hetrogenious platforms.