Cisco IPS Appliance Signature Engine

C.

The Cisco IPS (Intrusion Prevention System) appliance is a network security device that can detect and prevent a variety of network-based attacks. The IPS appliance is typically deployed at the edge of a network or in critical network segments to monitor traffic and block attacks in real-time.

The Cisco IPS appliance uses signature engines to inspect traffic for known attack patterns. Each signature engine is designed to detect specific types of attacks and has its own set of rules and algorithms.

In the case of IPv6 Layer 3 traffic inspection, the correct answer is option C, Atomic IP Advanced. This signature engine is specifically designed to inspect IPv6 traffic and provides advanced detection capabilities for IPv6-based attacks.

Option A, Atomic IP, is a signature engine that inspects IPv4 traffic, while option B, Meta, is a signature engine that provides a higher level of analysis by combining multiple other signature engines. Option D, Fixed, is not a valid signature engine, and option E, Service, is a signature engine that focuses on detecting attacks related to specific services such as FTP, HTTP, or DNS.

In summary, the correct answer is C, Atomic IP Advanced, as it is the signature engine that inspects IPv6 Layer 3 traffic.