INFORMATION PROCESSING SYSTEM, INFORMATION PROCESSING APPARATUS, SERVER APPARATUS, AND INFORMATION PROCESSING METHOD

摘要

PROBLEM TO BE SOLVED: To provide an information processing system capable of detecting a port maintenance time of a communication processing apparatus.

SOLUTION: The information processing apparatus 1 includes: a request packet transmission section 11 for transmitting a request packet for requesting transmission of a reply packet via the communication processing apparatus 2; a reply packet reception section 12 for receiving the reply packet; a port maintenance time detection section 13 for detecting the port maintenance time of the communication processing apparatus 2 on the basis of the received reply packet; and a request packet transmission control section 14 for controlling the transmission of the request packet by using a binary search method on the basis of the presence/absence of the received reply packet, and the server apparatus 3 includes: a request packet reception section 31 for receiving the request packet; a reply packet transmission section 32 for transmitting the reply packet; and a reply packet transmission control section 33 for controlling the transmission of the reply packet on the basis of the received request packet.

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