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Network behavior analysis (NBA) is a way to enhance the security of a proprietary network by monitoring traffic and noting unusual actions or departures from normal operation. Conventional intrusion prevention system solutions defend a network's perimeter by using packet inspection, signature detection and real-time blocking. NBA solutions watch what's happening inside the network, aggregating data from many points to support offline analysis.
After establishing a benchmark for normal traffic, the NBA program passively monitors network activity and flags unknown, new or unusual patterns that might indicate the presence of a threat. The program can also monitor and record trends in bandwidth and protocol use. Network behavior analysis is particularly good for spotting new malware and zero day exploits.
A good NBA program can help a network administrator minimize the time and labor involved in locating and resolving problems. It should be used as an enhancement to the protection provided by the network's firewall, intrusion detection system, antivirus software and spyware-detection program.
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