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Saadat Malik, CCIE No. 4955, manages the Technical Support Operations for the VPN and Network Security groups at Cisco Systems. As a contributor to the CCIE Security exams, he has developed deep knowledge of the issues important to CCIE Security certification. Saadat has taught computer networking at the graduate level at San Jose State University, and he is a regular speaker on various advanced network security topics at industry events and conferences.