Lecture123 utilizes a client-server architecture. The client computer is the computer you use to record or playback content. The server computers are housed in the Lecture123 data center and accessed over the Internet. The Presenter and Lecture123 Player software programs are installed on your computer -- the client. The content that is recorded is published over the Internet to the Lecture123 servers. This content repository is then accessed when viewers wish to playback content.
This client-server model does require a network connection to the Internet at times in order for various features of Lecture123 to operate. Lecture123 does support slower dialup modem connections for playback using streaming audio.