| Publisher | Columbia University | ||
|---|---|---|---|
| Format | 279.1KB PDF | Date added | 15 Sep 2004 |
| Topics | VoIP - IP Telephony, Communications Software, Network Design | ||
| Downloads | 10 | ||
Skype is a peer-to-peer VoIP client developed by KaZaa. 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 paper 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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