The Communicator, or the Message Routing Framework, serves as the communications backbone for the older managed products and Control Manager. This component of the Trend Micro Management Infrastructure (TMI) handles all communication between the Control Manager server and managed products for older products. Communicators interact with Control Manager to communicate with older managed products.
By installing the Control Manager 2.5 agent on a managed product server, you can use this application to manage the product with Control Manager. Agents interact with the managed product and Communicator. An agent serves as the bridge between managed product and communicator. Hence, you must install agents on the same computer as managed products.
The Control Manager installation checks if the Communicator is already available on the managed product server. If so, it does not install another instance of the Communicator. Multiple agents in a product server share a single Communicator. The Communicator takes care of:
Securing messages by encryption and anti-replay functions provided by the OpenSSL open source library, and Trend Micro-developed end-to-end authentication
Receiving and relaying commands from the Control Manager server to the managed product
Receiving and relaying status information from managed products to the Control Manager server
The above descriptions highlight the following points:
TMI can exist by itself; managed products, on the other hand, cannot operate in the absence of communicator
Though there can be as many agents on a server as there are managed products, only one Communicator is required for each server
Multiple managed products can share communicator functions