Benefits

Extensive Node Coverage

CDN has more than 2,800 globally distributed nodes. Among these nodes, more than 2,300 are distributed across 31 provincial regions in Mainland China. More than 500 are distributed across over 70 countries and regions, including Hong Kong (China), Macao (China), and Taiwan (China).

CDN supports a total bandwidth capacity of up to 150 Tbit/s and 10 GE network interface controllers (NICs). Each node provides 40 TB to 1.5 PB of data storage and a bandwidth capacity of 40 Gbit/s to 200 Gbit/s.

Please click here for more information about CDN node distribution.

Precise Scheduling

CDN has adopted various measures to improve its scheduling precision, including the continuous update of IP address precision for databases, delivery of HTTPDNS services, content-based scheduling to improve access hit ratio, and node health-based automatic scheduling.

CDN provides a precise scheduling system that can make offline scheduling plans based on historical traffic trends and schedules traffic based on traffic bursts in real-time. This way, CDN can monitor the health status of each edge node in real-time and allocate nodes for service access in an optimally.

Cost-Effectiveness

CDN offers competitive prices and allows you to flexibly customize the items to purchase. You can use the pay-as-you-go billing method and purchase resource plans based on your business requirements. If your resources are stored in Object Storage Service (OSS) buckets outside Mainland China, you can use CDN to accelerate the delivery of the resources from these buckets to edge nodes outside Mainland China for free. If your bandwidth usage exceeds 20 TB per month, you can contact Alibaba Cloud to make a minimum traffic commitment and get additional discounts.

Please see CDN Pricing and CDN Calculator for more information.

High-Performance Transmission Protocols

Quick UDP Internet Connection (QUIC) is a new transport layer network protocol that inherited qualities from TCP, TLS, and HTTP/2. QUIC supports encrypted, low-latency, and multiplexed connections. These qualities can meet the requirements for the transport and application layers.

Independently Developed Algorithms for the TCP Protocol Suite: Alibaba Cloud has developed algorithms to improve the performance of TCP, such as congestion detection and packet loss probing algorithms. The transmission performance has been improved significantly.

Sound Security Protection

CDN provides security protection capabilities. You can also use Secure CDN (SCDN) with CDN to protect resource security better. This solution can accelerate content delivery, prevent tenant IP addresses from risks, and protect resources against DNS attacks and HTTP flood attacks.

CDN supports primary and secondary origin servers and can monitor the health status of the origin servers. If the primary origin server fails, requests are redirected to a secondary origin server.

Configuration Customization

CDN allows you to use EdgeScript (ES) to customize configurations. If the standard configurations in the CDN console cannot meet your requirements, you can use ES to customize configurations and tailor your services for long-term commitment and various business requirements.

ES applies to scenarios where you want to rewrite and redirect requests, block requests, run A/B tests, perform throttling, and customize authentication logic, request and response headers, and caching policies.