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QUESTION 76
A Cisco IPS sensor has detected a large amount of malicious activity on the Certkiller network. How does a Cisco network sensor detect malicious network activity? (Select the best answer)
A. By using a blend of intrusion detection technologies
B. By performing in-depth analysis of the protocols that are specified in the packets that are traversing the network
C. By comparing network activity to an established profile of normal network activity
D. By using behavior-based technology that focuses on the behavior of applications

Correct Answer: A Section: (none) Explanation
Explanation/Reference:
Explanation:
Cisco Network based IDS (NIDS) uses a blend of leading intrusion detection technologies, and provide the
following benefits:

1. Comprehensive Threat Protection Multiple detection methods – Cisco uses multiple methods to accurately detect threats, including stateful pattern recognition, protocol analysis, traffic anomaly detection, and protocol anomaly detection. Additionally, Cisco IDS delivers a Layer 2 signature engine to provide protection from Address Resolution Protocol (ARP) spoofing techniques.