Which design principle involves redundancy through hardware, software, and connectivity?

Performance relates to how quickly a system executes tasks and processes data, not its ability to remain operational during failures.

Security focuses on protecting data and systems from unauthorized access, compromise, or damage, rather than ensuring continuous operational uptime through redundancy.

Scalability describes a system's ability to handle increasing workloads or expand its capacity, which is distinct from its resilience to failures.

High availability (HA) is a critical design principle focused on maximizing system uptime and minimizing service interruptions. It achieves this by implementing redundant components across hardware (e.g., power supplies, network interfaces), software (e.g., failover clusters, application replication), and network connectivity (e.g., redundant links, diverse paths) to provide fault tolerance and automatic recovery from failures.