What is Deep Packet Inspection?
What is Deep Packet Inspection?
Deep Packet Inspection (DPI) is a firewall process of examining a packet all the way up to Layer 7 of the OSI model. This means that it not only looks at the packet headers but also analyzes the actual data payload to determine if the packet should be permitted or denied. DPI is used to locate, identify, classify, reroute, or block packets with specific data or code payloads that traditional packet filtering, which only examines headers, cannot accurately identify.
ArubaOS-CX Switching Fundamentals Rev 20.21 page 93
D: Usually performed as part of a firewall defense, deep packet inspection functions at the application layer of the Open Systems Interconnection (OSI) reference model. Deep packet inspection (DPI) is an advanced method of examining and managing network traffic. It is a form of packet filtering that locates, identifies, classifies and reroutes or blocks packets with specific data or code payloads that conventional packet filtering, which examines only packet headers, cannot detect.