CN2 and CTG are both the names of China's international export bandwidth, and they represent different network lines and service quality. The following is a brief introduction and features of CN2 and CTG servers:

　　CN2 line (ChinaNet Next Carrying Network):

　　CN2 is a network line owned by China Telecom, which provides faster and more stable international export bandwidth.

　　CN2 line adopts global BGP routing optimization technology, which has lower network delay and higher bandwidth quality.

　　CN2 line is suitable for applications that have high requirements for network stability and low latency, such as game servers, video live broadcasts, etc.

　　CTG line (China Telecom Global):

　　CTG is a global network service brand under China Telecom, providing global network connection services.

　　CTG lines cover all continents around the world, with extensive network nodes and stable network infrastructure.

　　CTG lines are suitable for applications that require global coverage and higher bandwidth requirements, such as cross-border e-commerce, international enterprise network connections, etc.

　　Choosing CN2 or CTG lines depends on your specific needs and business scenarios. If your application is mainly for Chinese users or has higher requirements for network stability and low latency, then choosing the CN2 line may be more appropriate. If your application needs to cover global users or has higher bandwidth requirements, CTG lines may be more suitable.

　　In addition, whether you choose CN2 or CTG lines, it is important to choose a reliable service provider to ensure the stability of the data center, the quality and security of the network connection, to meet your business needs and user experience requirements.