Communication station, communication control program, and communication network system

A non-transitory computer readable medium having instructions stored therein, which when executed by the processor, causes the processor to execute steps comprising:

• receiving a packet from a network in which a plurality of communication stations are interconnected;
• determining whether the receiving unit receives a first packet in which a transmission source address is an address of a first communication station;
• transmitting a reply request packet to request a reply to the first communication station;
• and
• omitting to transmit the reply request packet when the first packet is received before the reply request packet is transmitted.

A communication network system in which a plurality of communication stations including a first communication station and a second communication station are interconnected, comprising:

• the first communication station transmits a reply request packet to request a reply to the second communication station;
• the second communication station transmits a reply packet corresponding to the reply request packet to the first communication station;
• and
• the first communication station omits to transmit the reply request packet when the first communication station receives a packet in which a transmission source address is an address of a second communication station before the first communication station transmits the reply request packet.