Computer Networks

Physical media and switching

This NPTEL course, taught by Prof. Sujoy Ghosh of IIT Kharagpur, runs to 40 lectures and starts from the emergence of networks and their reference models. It moves into physical media, multiplexing and telecom networks.

Optical and wavelength networks

A substantial part covers optical networking: SONET and SDH, fibre optic components, routing and wavelength assignment, and protection and restoration. The course is one of the few visible titles that goes deep into optical infrastructure.

Multiple access and data link

• Medium access, with token-based MAC protocols.
• Data link protocols that build on the switching lectures.
• Packet switches, which connect the physical layer material to routing.

The emphasis suits learners interested in carrier networks and hardware-level design.