Port of Entry/Exit
The port of entry is the point where a foreign national enters the United States. It is at this location where he will undergo an examination of identity, verification of biometric data, examination of the validity of one’s passport and where the attached visa will be allocated and/or approved to enter the United States.
The port of exit is that point where a foreign national departs the United States. It is at this location where he may undergo an examination of identity, verification of biometric data, examination of the validity of one’s passport and visa in order to verify that the visitor was “in status” during the period since the visitor entered the United States (See Overstay).