Currently, as the continual enrichment and development of network application, network fluxes become complex and there’re more types. And next are some common network fluxes:
1. HTTP flux: HTTP is the broadest protocol through Internet, which already took the place of main application layer protocol FTP that traditional file downloads. Now, as the appearance of YouTube and some video shared websites, HTTP protocol’s network flux exceeded the flux of P2P application flux during the past four years.
2. FTP flux: since the beginning of Internet, FTP is one of the application services used most, the importance is only inferior to HTTP and SMTP. And as the appearance of P2P application, although its importance reduces a little, it’s still one of the important applications and methods which is irreplaceable for users to download files.
3. SMTP flux: email is an important component of the entire Internet Business. According to Stat., above 3/4 users’ primary usage is to send/receive mails. Every day, there’re billions of emails transferring around the world. Especially, because of the cheapness and easy operation of email, someone may use it to spread his/her own messages, finally lead to a flooding of garbage mails in the Internet world.
4. VoIP flux: in 2006, global IP phone users increased from 10,300,000 to 18,700,000, the amplitude reaches 83%. Till 2007, VoIP communication flux had reached 75% of the global all communication flux. Therefore, the VoIP flux on Internet is