Network coding is a technique in network communication and information theory where intermediate network nodes perform algebraic operations on data packets rather than merely routing or replicating them. It constitutes a research field investigating the theoretical and practical implications of this in-network processing approach for optimizing network performance. This academic concept explores how encoding combinations of incoming information at network nodes can fundamentally alter data flow to improve metrics such as throughput, reliability, and efficiency, particularly in multicast and distributed systems. Its significance lies in demonstrating the potential to achieve network capacities exceeding those attainable with traditional routing paradigms.