Which is better, the CN2 line of the Korean cluster server or the ordinary international line? South Korea is located in the Liaodong Peninsula in Northeast Asia. As the region with the richest bandwidth resources in Asia, it is also a very important network hub in the Asia-Pacific region. In order to expand the network business in Southeast Asia, Australia or New Southwest, domestic enterprises often rent Korean cluster servers, but Korean cluster servers include CN2 dedicated line bandwidth and international bandwidth, which makes it difficult to choose. How to choose?
　　First, let’s take a look at what is the Korean CN2 line bandwidth and how to distinguish it:
　　1. The main difference between the CN2 bandwidth of the Korean cluster server and the international bandwidth is the different lines. The Korean cn2 optimized line is for domestic users to access. CN2 is proposed as a "boutique network project". Its technical structure is far ahead of the original telecommunications network. The extremely advanced QOS ensures the smoothness of the network. Of course, in addition to advanced technology, its expensive price and exclusivity to a large number of network resources are also the reasons for its high price. Ordinary vps cannot use CN2, because the VPS connected to the CN2 line computer room is sold at a much higher price than other lines. There are fewer users, fewer servers, and more exclusive resources allocated, which can ensure the smoothness of CN2 lines in most cases.
　　2. How to distinguish. You can use PING to detect that the bandwidth delay of CN2 optimized lines is low in China, generally between 30-80ms, and it is different in each region. You can also tracert the IP of Korean cn2 server to see if there is a 59.43.. segment IP. This IP segment is the IP of China Telecom backbone network. If there is, it is a cn2 line, if not, it is not.
　　2. Let's take a look at the difference between the Korean station cluster server CN2 line and the ordinary international line, and where are the advantages:
　　Difference 1. The network structure of CN2 line is perfect and the transmission speed is faster
　　Because the CN2 line is a network line directly connected to the mainland, while the general line will take a long detour, pass through multiple nodes, and even go around several circles before returning to China. This is like, we know that the shortest distance between two points is a straight line, and the general line may be a ball of wool, so the distance will inevitably be much longer. Even if the speed of light is faster, too much energy is consumed in the process of taking a detour. Not to mention the slow speed, the packet loss rate is also high. However, because the CN2 line goes directly to the country, it saves a lot of unnecessary signal loss, so the speed is fast and there is almost no packet loss.  
　　Difference 2: CN2 line servers can meet more business applications
　　CN2 carries China Telecom's SLA services with QoS guarantees, which can simultaneously meet voice, video, data, dedicated lines, international interconnection and other services. In order to effectively meet the QoS requirements of the services carried, the servers of the CN2 line provide high-performance network indicators, such as average one-way delay, maximum one-way delay, one-way packet loss rate, etc., which have reached the current international high level.
　　Difference 3: CN2 line servers cover a wider range
　　CN2 line is also a direct connection between the Korean computer room and the mainland, which can achieve faster speed and wider coverage. South Korea's CN2 line is directly connected to China Telecom. China Telecom's CN2 backbone network uses a three-layer network structure, including the core layer, the tandem layer and the edge layer. Their corresponding nodes are core nodes, tandem nodes and edge nodes. At present, the CN2 line network covers 31 provinces, autonomous regions, and municipalities, including CN2 backbone nodes and business nodes in 199 large and medium-sized cities in China, as well as the construction of overseas POP nodes. Therefore, Korean servers using CN2 lines have higher network quality and more extensive business needs than ordinary servers.
　　CN2 optimizes lines and international bandwidth types. Many users do not know how to choose between the bandwidths of these two networks when renting Korean cluster servers.
　　Three, which one is better for Korean cluster servers CN2 lines or ordinary international lines?
　　1. When we rent Korean cluster servers, if the main users of our business are domestic users, we must choose cn2. In fact, it is very simple, because the technology is different, when we are a foreign trade enterprise, we should choose Korean CN2 bandwidth servers to conduct business.
　　2. If it is only for local users in Korea, only international bandwidth is selected. However, some service providers have one server connected to two bandwidths at the same time. One server has access to 15M international bandwidth and 5M exclusive cn2 bandwidth, which can meet the access of local users and domestic users.
　　These are the differences between the Korean CN2 line cluster servers and ordinary international bandwidth. The servers of the Korean CN2 line are relatively good in terms of access speed and transmission quality.