After receiving your F-1 or J-1 Visa, you will be ready to enter the U.S. and receive your corresponding F or J Immigration Status upon arrival in the U.S.
Upon arrival in the U.S. you should present the stamp in your passport, and
I-20 / DS-2019 to the U.S. Custom and Border Patrol Immigration Officer for inspection. The officer will place a stamp in your passport annotated with the date of admission, Clase of Admission, and admitted untill date, also F-1 or J-1 and D/S (Duration of Status) stamp on your I-20 / DS-2019 form, and the I-94 card.
Please note, that when you enter the U.S., you may be subject to various security checks, including, being photographed and electronically fingerprinted. This is a routine procedure for anyone entering the U.S. with a visa and is part of the safety measures taken by the U.S. Department of Homeland Security (DHS).
DHS regulations require that you enter the U.S. on the Form I-20 or DS-2019 from the CUNY College or any other U.S. college that you plan to attend. If you do not do so, it is a violation of F-1 immigration laws and can result in loss of your student immigration status.