In network design, redundancy plays a crucial role in enhancing reliability and availability of network services. By incorporating duplicate paths, devices, or systems, networks can ensure continuity even when a primary component fails. Redundant configurations, such as using multiple routers or switches, provide alternate routes for data, preventing interruptions and minimizing downtime. This strategy is vital in critical systems where uptime is essential, as it offers a safeguard against potential failures and supports robust data transmission.