Arvind Kumar Bhardwaj completed the Cisco CCNA Routing and Switching: Introduction to Networks course as part of the Cisco Networking Academy program. The letter congratulates him on earning a Certificate of Completion and acquiring competencies such as understanding network devices, protocols, addressing schemes, and configuring routers, switches, and Ethernet networks. Cisco is proud to provide the knowledge and skills to build and maintain computer networks, which are increasingly important.