Mansour Kotb Mansour has completed the Cisco CCNA Routing and Switching: Connecting Networks course through Cisco Networking Academy. The letter from Cisco CEO Chuck Robbins congratulates Mansour on earning a Certificate of Completion and acquiring competencies such as understanding WAN technologies, VPNs, tunneling, NAT, and network monitoring. Robbins wishes Mansour continued success and states that Cisco is proud to provide the knowledge to build and maintain computer networks.