John Chambers, Chairman and CEO of Cisco Systems, Inc., has issued a certificate validating Ryanto Kusnendar's completion of requirements for the Cisco Certified Network Associate Routing and Switching certification as of September 26, 2013 and remaining valid through September 26, 2016. The certificate includes Ryanto Kusnendar's Cisco ID number and a verification number to confirm the certificate's authenticity on Cisco's website.