What are the characteristics of developing voice chat software with C/s technology?

Last issue we said B/s technology development chat has what advantages, this issue we come to the simple to say with C/s technology development and what characteristics?

Stability and flexibility: the application and service can be separated by C/s technology.
Second, security: C/S corresponds to the structure mode, generally only applicable to local area network, so the security is better.
Third, the speed is fast: The client and the server side is directly connected, the middle does not pass through other links, so the response speed is very fast.
Four, upgrade maintenance complex: If the software needs to upgrade maintenance, then each customer's machine to carry out the corresponding upgrade maintenance services, then this process is certainly more cumbersome.
In summary, for different chat rooms need to adopt different development technology, but at present many technical staff will choose B/s technology to develop voice chat software.

What are the characteristics of developing voice chat software with C/s technology?