A Survey of Application-Level Protocol Identification Algorithm
应用层协议识别算法综述

The ability to accurately identify the Internet traffic associated with different application-level protocols is essential to a broad range of network applications. Due to high speed of network and complexity of new protocols, traditional port-based application-level protocol identification method is becoming much more inaccurate. Therefore, a variety of protocol identification algorithms become a research hotspot. In this paper, several basic concepts of applicationlevel protocol identification are introduced first; then the identification algorithms being used or researched now are classified into three categories; their main difficulties, advantages and disadvantages are also analyzed; finally two future research directions are presented.