Architecture is provided for selecting an ad insertion system/server from a plurality of ad insertion systems/server for receiving broadcast transmissions and inserted advertisements. A gateway, as part of the architecture, selects an ad insertion system, in accordance with a developed client profile and a network factor associated with the communication performance of the ad insertion system. The gateway associates the developed profile with a client, and the gateway receives information relating the network factor from at least one ad insertion system. The gateway also ascertains the casting services (IP multicasting, IP multicasting proxy, and IP unicasting) supported by client. The ad insertion system may use the information about the supported casting services, with a developed client profile and a network factor for selecting an ad insertion system.