We first discuss the philosophy of multiple-layer abstraction of telecommunication networks, including control, management, and data planes, and then describe various network control and management techniques used in optical networks: operation, administration, and. We first discuss the philosophy of multiple-layer abstraction of telecommunication networks, including control, management, and data planes, and then describe various network control and management techniques used in optical networks: operation, administration, and. What is a ”non-SDN” network? What is Software Defined Networking? What is SDN? – ”Hybrid” SDN What is an “SDN controller”? Why use SDN? Is SDN the savior of failed device-level control plane interop? Who is using SDN today?Optical Communication Systems and Networks •Network management consist of a set of functions which are essential to operate and mantain any network: •For these purposes it is usual to break down the optical layer into three sublayers: –Optical channel layer: deals with individual end-to-end. The task of network control and management is generally realized in two logical planes – control and management – which collaboratively operate to ensure smooth, secure, and survivable traffic flow in the data plane of the network. Some of the functionalities are realized in the control plane. Optical networks, which utilize light to transmit data through fiber optic cables, offer high bandwidth, low latency, and reliability, making them the backbone of today's internet infrastructure. Effective management of these networks is crucial to ensure optimal performance, security, and. Network management and control protocols are software-based tools that enable administrators to monitor, manage, and control various aspects of an optical communication network. These protocols facilitate communication between different network elements, such as routers, switches, and optical line. Equipment Management as a segment of Network Management System gives administrators the capacity to control general operation of the NEs, superintend interaction among NEs and to upper layer administration framework, thus automating the task of managing complex network. This paper presents the role.