NBAR (Network Based Application Recognition)

Network Based Application Recognition (NBAR) is a mechanism that classifies and regulates bandwidth for network applications to ensure that available resources are utilized as efficiently as possible. Cisco Systems developed NBAR as part of its Content Networking platform for implementing intelligent network services.

NBAR allows network routers to recognize programs and take various actions based on that information. For example, a router might allocate all necessary bandwidth for mission-critical applications or flag low-priority, bandwidth-intensive applications for bandwidth throttling. The network administrator can view the mix of applications in use by the network at any given time and decide how much bandwidth to allow each application. (This regulation process is called bandwidth policing.)

Other capabilities of NBAR include:

• Optimizing multiple-service performance.
• Eliminating data-flow bottlenecks.
• Minimizing latency.
• Reducing or blocking spam.
• Detecting and blocking malware.
• Enhancing network security.
• Easy addition of new protocols.
• Reducing expenses and maximizing revenue.

One real-life example of NBAR in use was during the Code Red worm attacks of 2001. Most firewalls couldn't look into the HTTP data stream to identify Code Red traffic. However, implementation of NBAR made it possible to identify the suspect traffic and block access.

Source: www.whatis.techtarget.com

More sites to visit... Shared Pool Amazing Davao Tribu Hagtik A Day Called Today

P4P

P4P (proactive provider participation for P2P) is a protocol designed to improve the use of available bandwidth in a P2P network by reducing the overall volume of traffic. The term P2P (peer-to-peer) refers to any transient network on the Internet that allows a geographically dispersed group of end users to directly access files from each other's computers. P4P differs from the traditional P2P protocol by intelligently selecting peers to optimize routing efficiency.

Originally, P2P technology was used for simple file sharing such as text and images. However, in recent years, more bandwidth-hungry applications have evolved such as streaming media, Internet television, full-motion videoconference activity and online gaming. The extensive use of these applications has given rise among some experts to a concern that the Internet might "break under the strain." A major part of the problem is a tendency for traffic among routers to be unevenly distributed, resulting in inefficient routing with unnecessary hops between end users.

P4P minimizes the number of routers and hops involved in media distribution by means of devices called peer trackers and Internet trackers. When a peer has data to send, it queries the peer tracker for available peers in the local network. The peer tracker returns the information, if any is available, to the sending peer. If no local peers are available, the peer tracker queries the Internet tracker for available peers on the larger Internet. The Internet tracker returns a list of active peers to the peer tracker, which in turn provides the information to the original initiating peer. In effect, P4P does "proactive research" to determine the most efficient possible way for data to be routed between end users before any data is actually exchanged.

P4P technology, originally introduced by Verizon, has been shown to increase performance by as much as several hundred percent over traditional P2P. The extent of the improvement in any particular situation depends on the nature of the data to be shared, the overall volume of traffic, the number of routers involved, the available bandwidth and the network topology.

Source: http://whatis.techtarget.com

More sites to visit... Shared Pool Amazing Davao Tribu Hagtik