1.2 — Describe the benefits of using cloud services

High Availability

Azure backs High availabilityThe ability of cloud resources and applications to remain accessible with minimal downtime, even during disruptions, backed by SLA-defined uptime guarantees. with Service Level Agreements (SLAs) that specify guaranteed uptime percentages for each service.

Key point: SLAs are per-service guarantees. Composite architectures combining multiple services may have a lower combined SLA unless designed with redundancy (e.g., availability zones).

Scalability

ScalabilityThe ability to adjust resource capacity to match demand — up when traffic spikes, down when it subsides — paying only for what you use. in the cloud comes in two forms — vertical (resizing a single resource) and horizontal (changing the number of instances):

• Scale out = add more instances (handle more concurrent users)
• Scale in = remove instances (reduce cost when traffic drops)
• Scale up = increase resource size (handle heavier single-thread workloads)
• Scale down = reduce resource size (save money when over-provisioned)

Reliability

The cloud's decentralized, global design underpins ReliabilityThe ability of a system to recover from failures and continue to function; a pillar of the Microsoft Azure Well-Architected Framework., enabling applications to keep running even when parts of the infrastructure fail:

• Resources can be deployed across multiple regions worldwide.
• If one region experiences a catastrophic event, other regions continue operating.
• Applications can be architected to automatically fail over to a healthy region.

Predictability

Predictability comes in two forms:

Performance predictability — confidence that your application will have the resources it needs:

• Autoscaling adds resources when demand rises and removes them when it drops.
• Load balancing distributes traffic across healthy instances.
• High availability design patterns maintain consistent response times.

Cost predictability — confidence in your cloud spend:

• Track resource usage in real time with Azure Cost Management.
• Use the Azure Pricing Calculator to estimate costs before deploying.
• Set budgets and alerts to prevent surprise bills.

Both types of predictability are reinforced by following the Azure Well-Architected Framework.

Security

The cloud offers a range of security controls. The right choice depends on how much control you need:

Cloud providers are well-positioned to handle DDoS attacks due to massive network capacity and built-in mitigation services like Azure DDoS Protection.

Governance

GovernanceThe set of policies, controls, and auditing mechanisms that ensure deployed resources meet corporate standards and regulatory requirements. in the cloud is enforced through a combination of templates, policy, and auditing:

• Templates enforce that new deployments conform to approved configurations.
• Azure Policy flags resources that drift out of compliance and suggests remediation.
• Cloud-based auditing provides a continuous compliance baseline.
• Automatic patches (in PaaS/SaaS) help maintain governance standards without manual effort.

Establishing a governance footprint early keeps your cloud environment secure, compliant, and manageable at scale.

Manageability

There are two dimensions of manageability:

Management OF the cloud (what you can manage automatically):

• Autoscale resources based on demand
• Deploy from preconfigured templates (no manual configuration)
• Monitor resource health and automatically replace failing resources
• Receive real-time alerts when metrics breach thresholds

Management IN the cloud (how you interact with resources):