The ability of a computer network to recover from any kind of error like connection failure, loss of data, etc. is known as:

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Correct — D, Resilience. In networking, resilience is exactly this property: the network keeps delivering service, and recovers, when something breaks — a cut link, a failed router, corrupted or lost packets. It is engineered through redundancy (alternate paths, duplicate hardware), automatic failover and re-routing, error detection with retransmission, and backups. The ordinary meaning of the word is the memory hook: resilience is the ability to bounce back from disruption.

Why the other options are wrong — (a) Routing is the selection of the path a packet takes from source to destination, done by routers using routing tables and protocols. Re-routing can be one mechanism that delivers resilience, but the word itself names path selection, not recovery from failure.  (b) Bandwidth is capacity — how much data a link can carry per unit time, measured in bits per second. A high-capacity link does not help at all once that link is broken.  (c) Contention is the opposite kind of situation: two or more devices competing for the same shared channel (as on classic Ethernet, handled by CSMA/CD), which produces collisions and delay rather than recovery.

Concept: Network vocabulary splits into performance words and dependability words. Bandwidth, throughput and latency describe how well a network performs when everything is working. Resilience, fault tolerance and availability describe what happens when something fails. Resilience is bought with redundancy: more than one physical path between two points (a mesh or ring rather than a single line), standby devices that take over automatically, protocols that detect loss and retransmit (TCP), and off-site backups of data.

State PCS 2025 Q48 — Science & Technology PYQ with Answer

State PCS 2025 Q48 — Science & Technology PYQ with Answer