I. Introduction
Precise identification and categorization of network traffic according to source applications is essential for many network management tasks such as flow prioritization, traffic shaping/policing, and diagnostic monitoring [1]–[3]. For instance, the network administrator can leverage traffic classification to identify the problem of internal network whether a certain type of traffics occupy most of the network bandwidth. The Internet Service Provider (ISP) can analyze the composition of traffic with traffic classification, which can help make the distribution of content distribution network (CDN) more convincing. Besides, the firewall can also detect potential malicious attacks with the help of traffic classification system.