CSIP: PRELIMS BOOSTER SERIES-370 Science and Technology


Dark Fiber


The Securities Appellate Tribunal (SAT) has overturned the Securities and Exchange Board of India’s (Sebi) fine of Rs 7 crore on the National Stock Exchange (NSE) in the dark-fibre case.

Dark Fiber

Dark fiber, also known as unlit fiber, is an intriguing and powerful tool in the world of telecommunications. It refers to unused fiber optic cables, strands of glass that can transmit data at incredible speeds, but haven’t been activated yet. Think of them like empty highways just waiting to be filled with the data traffic of your choice.


  • Scalability and Flexibility: You control the entire bandwidth, allowing you to adapt to changing needs and scale your network up or down as required.
  • Security and Privacy: Dedicated fiber means no shared bandwidth and potentially less vulnerability to eavesdropping or interference. Ideal for sensitive data transmission.
  • High Speed and Reliability: Fiber optics offer unparalleled speed and low latency, crucial for real-time applications like financial trading or cloud computing.
  • Cost-effective for High Bandwidth: Particularly beneficial for organizations with large data transfer needs, as it can be cheaper than leasing bandwidth from a service provider.


  • Building Private Networks: Businesses and organizations can create customized, secure networks for internal communication and data exchange.
  • Connecting Data Centers: Facilitates high-speed data transfer between data centers located across long distances.
  • Backhauling Mobile Traffic: Provides a reliable and efficient way to connect cell towers to the core network.
  • Supporting Emerging Technologies: Offers the infrastructure needed for technologies like 5G, the Internet of Things (IoT), and artificial intelligence (AI).


  • Initial Investment: Leasing or buying dark fiber can be expensive upfront, though it can be cost-effective in the long run for high-bandwidth users.
  • Technical Expertise: Managing a dark fiber network requires specialized knowledge and equipment, which might necessitate hiring experts or partnering with service providers.
  • Limited Availability: Dark fiber isn’t readily available everywhere, and securing long-distance routes might be challenging.