Abstract: A mechanism that enables developer replenishment by a simpler structure and a mechanism that enables more user-friendly developer replenishment are provided. An attachment port to which a developer supply bottle containing a developer stored therein is detachably attachable is disposed in an interior of an image forming apparatus. The developer supply bottle can be attached when the cover is in an open state. According to this image forming apparatus, when the developer supply bottle is attached to the attachment port, the developer inside the developer supply bottle moves into a developer housing chamber by its own weight.

Abstract: A communication apparatus includes a bandwidth calculation part that calculates a bandwidth for each application, a change rate calculation part that calculates a bandwidth change rate for each application based on the bandwidth for each application presently calculated and the bandwidth for each application previously calculated, and a policy selection part that selects a policy to be applied to communication traffic between a server and a terminal based on the calculated bandwidth change rate for each application.

Abstract: A network system according to the present invention includes: a server that provides a content to a communication terminal; a relay device that establishes a connection with the server; and a DNS server that stores an IP address of the server. When accepting an inquiry of the IP address of the server being a providing source of the content from the communication terminal, the relay device inquires the IP address from the DNS server, and performs in parallel processing of transmitting the IP address received in response to the inquiry to the communication terminal, and processing of establishing a connection with the server assigned the IP address.

Abstract: A network system according to the present invention includes: a server that provides a content to a communication terminal; a relay device that establishes a connection with the server; and a DNS server that stores an IP address of the server. When accepting an inquiry of the IP address of the server being a providing source of the content from the communication terminal, the relay device inquires the IP address from the DNS server, and performs in parallel processing of transmitting the IP address received in response to the inquiry to the communication terminal, and processing of establishing a connection with the server assigned the IP address.