Ciena is a networking systems, services, and software company that specializes in providing solutions for high-speed optical networking and routing. The company's primary business revolves around enabling the efficient and reliable transmission of large amounts of data over long distances. Ciena's core focus is on developing and manufacturing advanced optical networking equipment, including optical transport systems, packet-optical platforms, and software-defined networking (SDN) solutions. Ciena also offers a range of services to support the deployment and management of its networking solutions. In addition to hardware and services, Ciena provides software solutions for network automation, orchestration, and analytics.