Method of operating a client terminal and the client terminal, method of operating a transmission server and transmission server, and program

This technology, the configuration for distributing various VoD content, the client terminal can be reduced manufacturing cost of the client terminal is a television set, a development cost, and maintenance cost, and operation of the client terminal method, the operation method of transmission and outgoing server, and a program. Operable application (program) 111 on the browser 91 based on the control information, itself presents a VoD content selectable from among the presented VoD content and delivery of VoD content selected, bi-directional requests the VoD server 72 via the first network is an IP network. In response, the headend 12 is a transmission server provides the client terminal 13 via the second network the downlink transmission band has a sufficient bandwidth for the transmission of the content. This technology can be applied to IPTV delivery system.