Editing Deep packet inspection (section)

===Quality of service===
DPI can be used against [[net neutrality]].

Applications such as [[peer-to-peer]] (P2P) traffic present increasing problems for broadband service providers. Typically, P2P traffic is used by applications that do file sharing. These may be any kind of files (i.e. documents, music, videos, or applications). Due to the frequently large size of media files being transferred, P2P drives increasing traffic loads, requiring additional network capacity. Service providers say a minority of users generate large quantities of P2P traffic and degrade performance for the majority of broadband subscribers using applications such as e-mail or Web browsing which use less bandwidth.<ref>{{cite web|url=http://www.lightreading.com/insider/details.asp?sku_id=1221&skuitem_itemid=957|title=Deep Packet Inspection: Taming the P2P Traffic Beast|website=[[Light Reading]]|access-date=2008-03-03|archive-url=https://web.archive.org/web/20080302113455/http://www.lightreading.com/insider/details.asp?sku_id=1221&skuitem_itemid=957|archive-date=2008-03-02|url-status=dead}}</ref> Poor network performance increases customer dissatisfaction and leads to a decline in service revenues.

DPI allows the operators to oversell their available bandwidth while ensuring equitable bandwidth distribution to all users by preventing network congestion. Additionally, a higher priority can be allocated to a VoIP or video conferencing call which requires low latency versus web browsing which does not.<ref>{{cite web|url=http://www.computerworld.com/article/2541004/networking/ball-state-uses-deep-packet-inspection-to-ensure-videoconferencing-performance.html|title=Ball State uses Deep Packet Inspection to ensure videoconferencing performance|date=2007-09-17|website=[[computerworld]].com|author=Matt Hamblen|access-date=2008-03-03}}</ref> This is the approach that service providers use to dynamically allocate bandwidth according to traffic that is passing through their networks.