Technological and security enhancements in third generation (3G) architecture led to the development of the fourth
generation (4G) technology. 4G is developed and standardized by the 3GPP which is a fully IP based topology and also referred
to as the future communication technology. 3GPP provided LTE (Long Term Evolution) usually referred to as the standard for
fourth generation telecommunications. This paper reviews the core architecture of the 4G network and also reviews the
Authentication and key agreement (AKA) protocol as the access mechanism to a 4G network which shows the strong security
aspects of the fourth generation technology.