Next gen firewalls (NGFWs) are deep packet inspection firewalls which provide a level of security notably greater than that of traditional firewalls by moving beyond port/protocol inspection. They track layers 2 to 7, whereas traditional firewalls only tracked layers 2 to 4.

This infographic outlines the basic functions and main features of NGFWs, explains how they differ from traditional firewalls and advises on the key questions to ask when choosing an NGFW.