CompTIA Cloud Essentials+ (CLO-002)Management and Technical OperationsHard
A cloud administrator is tasked with ensuring high availability for an application deployed across multiple virtual machines (VMs) in a single cloud region. They need to protect the application from failures of individual physical servers, network switches, or power outages within that region. Which cloud concept should be utilized to achieve this level of intra-region fault tolerance?
- AEdge Locations
- BContent Delivery Network (CDN)
- CMulti-Region Deployment
- DAvailability Zones
Show answer & explanationAnswer & explanation
Correct answer: D. Availability Zones
Availability Zones are physically separate, isolated locations within a single cloud region, designed to be independent failure domains. Deploying across multiple Availability Zones protects applications from failures affecting a single data center or infrastructure component within the region.
Why the other options are wrong
- A. Edge Locations are part of a CDN and are for content delivery, not for ensuring application fault tolerance within a region.
- B. A CDN caches content for faster delivery and does not address the underlying infrastructure fault tolerance within a cloud region.
- C. Multi-region deployment protects against an entire region failure, but the question specifies 'within that region'.
Availability Zone (AZ)
One or more discrete data centers with redundant power, networking, and connectivity within a cloud region, designed for fault isolation.
- Physically separated from other AZs in the same region.
- Connected by low-latency links.
- Used to build highly available applications within a single region.
Memory trick: Regions are big, AZs are smaller safe zones inside.