采用“停一等”协议、超时重传、错误重传等措施，提高了在应用编程的灵活性、可靠性和稳健性。

Some measures such as "stop-and-wait" protocol, and overtime and error retransmissions are taken. As a result, the flexibility, reliability and robustness of IAP are enhanced.

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该协议基于停等协议，适用于半双工通信方式。

This protocol is based on Stop-and-Wait protocol and it is suitable for half-duplex communication.

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