Potential of EBL and cosmology studies with the Cherenkov Telescope Array

► CTA will be a superb machine for probing the extragalactic background light (EBL). ► Several CTA layouts have been investigated in detail for their performance. ► For low energy studies of steady objects, the array layout B is the best. ► For rapid transient phenomena like GRBs, array layout B and I are the best. ► For EBL precision measurement in mid-ifrared, all proposed arrays perform well.