Packets on the network to be transmitted to the target site, the packet length can not exceed the value of PMTU.
数据包在网络上传输到目标站点，包长不能超过PMTU值。
Researched on the current main PMTU discovery algorithms, such as Increase algorithm, Decrease algorithm, and Hierarchical algorithm.
探讨了目前主流的PMTU探测算法，如递增法，递减法，分层探测算法的优缺点。
The Heartbeat Extension provides a new protocol for TLS/DTLS allowing the usage of keep-alive functionality without performing a renegotiation and a basis for path MTU (PMTU) discovery for DTLS.
TLS心跳扩展为TLS/DTLS提供了一种允许在不重新进行商议和发送路径MTU探索包（PMTU）的情况下而使用保持持续通信功能的新协议。
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