Which Cisco IPS appliance signature engine defines events that occur in a related manner, within a sliding time interval, as components of a combined signature?
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A. B. C. D.D.
The Cisco IPS (Intrusion Prevention System) appliance has different signature engines that are responsible for analyzing network traffic and detecting potential security threats. One of these signature engines is the meta engine.
The meta engine is designed to analyze events that occur in a related manner within a sliding time interval. It combines different components of a potential security threat and treats them as a single signature. This approach provides a more accurate and comprehensive analysis of potential threats, as it considers the context and relationship between individual events.
For example, if the meta engine detects several failed login attempts from the same IP address within a short period, it may trigger an alert for a potential brute-force attack. The meta engine can also detect different types of attacks that occur in a sequence, such as a port scan followed by an attempted exploit.
In contrast, the service engine is responsible for analyzing network traffic and detecting specific protocols and applications. The sweep engine analyzes network traffic for specific patterns, such as a specific sequence of bytes, and the multistring engine detects strings or patterns in network traffic.
In summary, the meta engine in the Cisco IPS appliance is responsible for combining different components of a potential security threat into a single signature, providing a more accurate and comprehensive analysis of potential threats.