With Deep packet inspection, which of the following OSI layers are involved?

A. Layer 2 through Layer 7

B. Layer 3 through Layer 7

C. Layer 2 through Layer 6

D. Layer 3 through Layer 6

E. Layer 2 through Layer 5

F. None of the choices.

Explanation:

Deep packet inspection (DPI) is a form of computer network packet filtering that examines the data part of a through-passing packet, searching for non- protocol compliance or predefined criteria to decide if the packet can pass.

DPI devices have the ability to look at Layer 2 through Layer 7 of the OSI model.