Scalability Challenges in Blockchain

Capacity

Blockchain scalability challenges fundamentally relate to transaction throughput, constrained by block size and block time; increasing these parameters directly impacts network capacity, yet introduces trade-offs concerning decentralization and security. Layer-2 solutions, such as state channels and rollups, represent attempts to augment base-layer capacity by processing transactions off-chain, thereby reducing congestion and associated fees. The inherent limitations of consensus mechanisms, particularly Proof-of-Work, pose a significant bottleneck, necessitating exploration of alternative consensus protocols like Proof-of-Stake to enhance scalability.