Hello,

Classes are held in study centre only where a student gets enrolled, atteding classes is personal choice entirely, it's not compulsory in either of cases, the core difference between DU SOL and IGNOU is study centre of DU SOL are limited in the state only, unlike in case of IGNOU which has regional centre in every states, and study centre function under RC, so you can find study centre/colleges under various district of your state, say you belong to UP there are Regional Centre in Noida/Lucknow/Varanasi etc, you can choose as per your preference, study centre are allotted in IGNOU for assignment submission, conducting term end exams, and if you wish you can attend classes which are held on weekends only, but due to pandemic as I said things are different as of now.

and the reason being IGNOU is the largest open university, but due to the pandemic both the university have started helping students with online education, and this helps in current situation also,