Deep packet inspection is an advanced computer network packet filtering system that inspects every packet of data. Deep packet inspection (DPI) is identify and classify traffic based on a signature database that includes information.
Deep Packet Inspection is a network packet filtering method that analyses the data part of a packet related to everything you send and receive online. In simple words, it is an advanced filtering system that inspects every packet of data when it passes a firewall. Based upon your specified set of rules the packet is scrutinized for viruses, intrusions, spam, and protocol non-compliance, and accordingly, it allows and rejects it.