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Anti-DDoS
Anti-DDoS
- What's New
- Function Overview
- Service Overview
- Getting Started
- User Guide
- Best Practices
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API Reference
- API Usage Guidelines
- Before You Start
- API Overview
- API Calling
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API
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Anti-DDoS Management
- Querying the List of Defense Statuses of EIPs
- Querying Optional Anti-DDoS Defense Policies
- Querying Weekly Defense Statistics
- Querying Configured Anti-DDoS Defense Policies
- Updating Anti-DDoS Defense Policies
- Querying the Traffic of a Specified EIP
- Querying Events of a Specified EIP
- Querying Configured Anti-DDoS Defense Policies
- Anti-DDoS Task Management
- Alarm configuration management
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Anti-DDoS Management
- Examples
- Appendix
- Out-of-Date APIs
- SDK Reference
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FAQs
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General FAQs
- What Are Regions and AZs?
- What Is the Black Hole Policy of HUAWEI CLOUD?
- What Are a SYN Flood Attack and an ACK Flood Attack?
- What Is a CC Attack?
- What Is a Slow HTTP Attack?
- What Are a UDP Attack and a TCP Attack?
- What Are the Differences Between DDoS Attacks and Challenge Collapsar Attacks?
- Does Anti-DDoS Provide SDKs and APIs?
- CNAD Basic (Anti-DDoS) FAQs
-
General FAQs
- Videos
On this page
What Are Regions and AZs?
Updated on 2024-11-29 GMT+08:00
Concepts
A region and availability zone (AZ) identify the location of a data center. You can create resources in a specific region and AZ.
- Regions are divided from the dimensions of geographical location and network latency. Public services, such as Elastic Cloud Server (ECS), Elastic Volume Service (EVS), Object Storage Service (OBS), Virtual Private Cloud (VPC), Elastic IP (EIP), and Image Management Service (IMS), are shared within the same region. Regions are classified as universal regions and dedicated regions. A universal region provides universal cloud services for common tenants. A dedicated region provides services of the same type only or for specific tenants.
- An AZ contains one or more physical data centers. Each AZ has independent cooling, fire extinguishing, moisture-proof, and electricity facilities. Within an AZ, computing, network, storage, and other resources are logically divided into multiple clusters. AZs within a region are interconnected using high-speed optical fibers to allow you to build cross-AZ high-availability systems.
Selecting a Region
If you or your users are in Europe, select the EU-Dublin region.
Selecting an AZ
When determining whether to deploy resources in the same AZ, consider your applications' requirements on disaster recovery (DR) and network latency.
- For high DR capability, deploy resources in different AZs in the same region.
- For low network latency, deploy resources in the same AZ.
Parent topic: General FAQs
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