Does the Redundancy Cover It?

About this interactive

Three short lessons, one idea: duplicate it, and check that the duplicate really stands on its own. Cooling: you need more than one air-conditioning unit, because without cooling the equipment overheats. The units only cover each other if one can do the job when the other is down. Networking: the lesson's diagram joins two LANs by two paths, so if one path or one router goes down, the sites stay connected. ISP: the internet connection is a single point of failure. Two connections from the same provider guard against one connection failing, but not against the provider itself having a problem, so spread them across providers. The backup is often smaller, such as a cellular line, and only for critical services. To sort a card, find what failed and ask whether the setup has a second one that does not depend on it.

What you'll learn

Decide whether redundant cooling covers the failure of one unit, including when the units share a circuit or the room needs every unit
Decide whether redundant network paths keep two sites connected when a link or router fails
Decide whether redundant internet connections survive a failure, including a problem with the provider itself

Aligned to

CompTIA Security+

3.4 Explain the importance of resilience and recovery in security architecture.

Key terms

Redundant Cooling System: The use of multiple cooling units in a data center to ensure continuous temperature regulation if one unit fails.
Redundant Network Path: An alternate physical or logical route between network sites that maintains connectivity if the primary link or router fails.
ISP Redundancy: The use of multiple internet service providers to ensure continued connectivity if one provider experiences an outage.
Single Point of Failure: A component within a system whose failure would cause the entire system or service to become unavailable.

Topics

Interactive Streak Sort

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