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TURN

From Wikipedia (Zh) - Reading time: 1 min

TURN(全名Traversal Using Relay around NAT),是一種資料傳輸協議(data-transfer protocol)。允許在TCP或UDP的連線上跨越NAT防火牆

TURN是一个client-server协议。TURN的NAT穿透方法與STUN類似,都是通過取得應用層中的公有地址達到NAT穿透。但實現TURN client的終端必須在通訊開始前與TURN server進行交互,並要求TURN server產生"relay port",也就是relayed-transport-address。這時TURN server會建立peer,即遠端端點(remote endpoints),開始進行中繼(relay)的動作,TURN client利用relay port將資料傳送至peer,再由peer轉傳到另一方的TURN client。

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Licensed under CC BY-SA 3.0 | Source: https://zh.wikipedia.org/wiki/TURN
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