ActiveX uses DCOM to communicate over HTTP, which has the advantage of being transparent to most firewalls and proxy servers. This ensures that your security is always honored. Minimizes bandwidth requirements and server hits for fast response times. Fully scalable to support unlimited numbers of concurrent users. HTTP does not require a permanent connection between browser and server, allowing the application to be insulated from unreliable public Internet connections.
Security is managed by signing the controls.
Supports a server farm configuration, so individual users do not need to be configured to a particular server. Proxy servers are supported without additional configuration.