Network Based Application Recognition: Difference between revisions

Revision as of 11:40, 16 February 2018

Revision as of 02:12, 14 May 2020

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'''Network Based Application Recognition''' (NBAR)<ref>[https://web.archive.org/web/20050924161229/http://www.cisco.com/univercd/cc/td/doc/product/software/ios122/122newft/122t/122t8/dtnbarad.htm NBAR defined at Cisco website]{{dead link|date=February 2018 |bot=InternetArchiveBot |fix-attempted=yes }}</ref> is the mechanism used by some [[Cisco]] [[Router (computing)|router]]s and [[Network switch|switches]] to recognize a [[Traffic_flow_(computer_networking)|dataflow]] by inspecting some [[packet (information technology)|packets]] sent.

The [[Computer network|networking]] equipment which uses NBAR does a [[deep packet inspection]] on some of the packets in a dataflow, to determine which traffic category the flow belongs to. Used in conjunction with other features, it may then program the internal [[application-specific integrated circuits]] (ASICs) to handle this flow appropriately. The categorization may be done with [[Application_layer|Open Systems Interconnection (OSI) layer 4]] info, packet content, signaling, and so on but some new applications have made it difficult on purpose to cling to this kind of tagging.<ref>[[BitTorrent protocol encryption|BitTorrent Encryption and Obfuscation]]</ref>