Nowadays networks transport a huge amount of information. New applications like VTC, VoIP, streaming video, network games, P2P come in market every day. Different traffic need different service level, some traffic we can classify even as unwanted. Existing network devices like IDS, firewalls and routers don’t have mechanisms for automatic traffic classification, so a lot of handwork must by done to set up network and adapt it day by day. In the same time a lot of job is done in field of artificial intelligence, data mining, machine learning etc. In this paper I will summarize existing solutions and create simplified model for network traffic identification and classification purposes.