At Algiers Houari Boumediene airport, passengers connecting between two international flights can usually stay in the transit area without going through immigration. If you connect from an international to a domestic flight, you enter the country here: you go through immigration and collect and re-check your bags.
The airport has 2 terminals or concourses (International terminal (West, Terminal 4), Domestic terminal (East, Terminal 1)).
Connecting passengers go through a transfer security screening.