Ciena Corporation , the network specialist, today announced the successful completion of its acquisition of Cyan, Inc., a leading provider of next-generation software and platforms to enable open, agile and scalable software-defined networks, pursuant to the terms of the acquisition agreement. "Ciena and Cyan make a great combination for our customers as they transform their networks with web-scale technologies to go beyond delivering capacity to create capabilities on demand," said Gary Smith, president and CEO, Ciena.