肖建彬的博客

作者: 肖建彬 | 可以转载, 转载时务必以超链接形式标明文章原始出处和作者信息及版权声明
网址：http://www.xiaojb.com/archives/it/an_analysis_of.shtml

Skype is a peer-to-peer VoIP client developed by KaZaa in 2003.
Skype claims that it can work almost seamlessly across NATs and
firewalls and has better voice quality than the MSN and Yahoo
IM applications. It encrypts calls end-to-end, and stores user
information in a decentralized fashion. Skype also supports
instant messaging and conferencing.
This report analyzes key Skype functions such as login, NAT and
firewall traversal, call establishment, media transfer, codecs, and
conferencing under three different network setups. Analysis is
performed by careful study of Skype network traffic.

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