On another hand, fault-tolerant mechanism depends on the quick detection of node failure, node failure detection is always performed by heartbeat protocol.
另一方面，集群操作系统的容错机制依赖于节点失效的快速检测，节点失效检测通常由心跳协议来完成。
SCTP monitors the paths of the association using a built-in heartbeat; upon detecting a path failure, the protocol sends traffic over the alternate path.
SCTP负责使用内嵌的heartbeat机制来监视联合的路径；在检测到一条路径失效时，协议就会通过另外一条路径来发送通信数据。
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。
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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