作者candyhuang (candy)
看板PangSir
标题[问题][VoIP] ACK是否要透过proxy server转送
时间Sat Dec 2 00:58:24 2006
请问ACK是否由Proxy server转送呢?
跟据rfc3261 page12里面的图，ACK是直接由caller
送给callee，而不透过proxy server转送。
page16的解释
In this example, the ACK is sent directly from Alice's softphone
to Bob's SIP phone, bypassing the two proxies. This occurs because
the endpoints have learned each other's address from the Contact
header fields through the INVITE/200 (OK) exchange.
但是在course slide: 02_SIP_02.pdf 的page10
ACK是先丢给proxy 再到callee。
请问这两种做法有什麽差异吗
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