VPS has become the tool of choice for many small and medium-sized enterprises and technology enthusiasts. Among the many network lines, CMI and CN2, as the two main international export lines, have also become the most concerned comparison items when users choose overseas VPS. So, which one is better, CMI VPS or CN2 VPS?

　　1. What are CMI and CN2?

　　CMI is an international export network established by China Mobile to expand its international business. It is mainly used to provide high-speed and stable connections for cross-border communications and international IDCs. The characteristics of the CMI network are large capacity and low price. It mainly serves China Mobile users, so it performs relatively well in southern China (especially Guangdong and Fujian).

　　CN2 is a high-end international export network launched by China Telecom, especially the CN2 GIA line, which adopts independent bandwidth and priority forwarding strategy, has extremely low packet loss rate and delay, and is currently recognized as one of the best international access networks. Its users are mainly telecom broadband users, especially in North China and East China.

　　2. Comparison of network architecture

　　CN2 is significantly better than CMI in architecture, especially in terms of international communication quality and optimization capabilities.

　　CMI is deployed globally, but node resources are concentrated in the Asia-Pacific region. Usually there are many detours, and the return line may be unstable. It uses BGP dynamic routing, but the priority is not as good as CN2. It mainly undertakes large traffic, casts a wide net but lacks fine optimization.

　　The CN2 architecture has GIA high-end lines and independent core backbone resources. The dedicated line directly connects to core nodes in the United States, Japan, Hong Kong and other places.The return route is prioritized to CN2 GT or GIA, with fewer detours and high stability. Targeted optimization strategy, some nodes support QoS priority.

　　3. Speed ​​and latency test

　　We tested the latency and bandwidth performance of CMI VPS and CN2 VPS from major cities in mainland China (Beijing, Shanghai, Guangzhou) to the US and Hong Kong nodes, and the results are as follows:

　　Beijing Ping: CMI Hong Kong 70-90ms, CMI US 180-220ms, CN2 Hong Kong 45-55ms, CN2 US 130-160ms

　　Shanghai Ping: CMI Hong Kong 60-80ms, CMI US 170-200ms, CN2 Hong Kong 35-50ms, CN2 US 120-150ms

　　Guangzhou Ping: CMI Hong Kong 40-60ms, CMI US 150-180ms, CN2 Hong Kong 30-40ms, CN2 US 110-130ms

　　Conclusion: CN2 wins in latency and jitter control, especially for applications with high requirements for low latency such as game acceleration, foreign trade calls, SSH operation, etc.; CMI performs well in terms of bandwidth and is suitable for transmission tasks.

　　4. Stability Comparison

　　CMI VPS: The network is greatly affected by international export congestion, and there are fluctuations and packet loss during the evening peak, especially on weekends or holidays.

　　CN2 VPS: Thanks to the independent export and priority forwarding mechanism, the stability is very high, with small fluctuations 24 hours a day, and good quality can be maintained even during peak hours.

　　When choosing a VPS, there is no absolute better, only more suitable. CMI VPS and CN2 VPS have their own advantages. If you are looking for stability and extreme speed, CN2 GIA is the best choice; if you want to deploy overseas service nodes and distribute unpopular content at a lower cost, CMI VPS will be a good starting point.