As Deep Packet Inspection (DPI) has become more entrenched in multiple areas of the network, it has also become a strategic investment for almost all Tier-1 and Tier-2 service providers (SPs).

In this article Bojan Radulović, CCNP, CCDP, CCDA and CCSI at NIL Data Communications, focuses primarily on the application of DPI in the mobile space, as the need to enforce policies there has the greatest impact, but the various design aspects discussed here may be applied in other environments as well.