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Server High Availability and Security Diversity

publish date: 2026/10/04 04:25:26.005927 UTC

To maximize availability and guard against security threats, critical networks deploy redundant backup servers running different operating systems. Why is this diverse multi-OS strategy used?

To lower the overall financial cost of software development and system licensing.

To ensure that an attack or bug exploiting a specific OS vulnerability does not bring down all redundant servers.

To achieve both software diversity and system redundancy across server infrastructure.

To force hardware components to wear out at identical rates.

Reference

Software Engineering, Ian Sommerville, 9th edition

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Redundancy and Diversity

Server High Availability and Security Diversity

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Reference

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