In a SONET identify between a section a line a path

SONET stands for Synchronous Optical Network. SONET is a communication protocol that is used to transmit a large amount of data over relatively large distances using optical fibre.

SONET Layers:-

1. Path Layer:

• It is end-to-end portion of the network.
• Path layer is used for the movement of signals from its optical source to its optical destination.
• Path layer functions are provided by STS Mux/Demux.

2. Line Layer:

• It is portion of network connecting two neighbouring multiplexers.
• Line Layer is responsible for the movement of signal across a physical line.
• Line layer functions are provided by STS Mux/Demux and Add/Drop Mux .

3. Section Layer:

• It is portion of network connecting two neighbouring devices.
• Section layer is responsible for the movement of signal across a physical section.
• Each device of network provides section layer functions.

4. Photonic Layer:

• It is the physical layer of the OSI model.
• This layer includes physical specifications for the optical fibre channel.