Prison is a place where a convict is physically confined and denied fundamental freedoms they are entitled to.
In USA, there are national, federal prisons and the state owned, state prisons (Diiulio, J.J., 2002). While state prisons host dangerous criminals like rapist and murders, the federal prisons house those convicted of violating federal laws: large scale drug peddlers and robbers of federal chattered banks.
Whereas the federal prisons are categorized into minimum; low; close; high; maximum and super max security levels, the state prisons are only categorized into minimum; maximum and medium levels.
Both the state prisons use security level classification system in which the prisoners are vetted at the reception centers to determine the next step