# 数据流

类似SCTP、SSH和HTTP/2，QUIC在同一物理连接上可以有多个独立的逻辑数据流。这些数据流并行在同一个连接上传输，不影响其他流。

连接在两个端点之间经过类似TCP连接的方式协商建立。QUIC连接基于UDP端口和IP地址建立，而一旦建立，连接通过其“连接ID”（connection ID）关联。

在已建立的连接上，双方均可以建立传输给对方的数据流。单一数据流的传输是可靠、有序的，但不同的数据流间可能无序传送。

QUIC可对连接和数据流分别进行流量控制（flow control）。

进一步细节参见[连接](/zh/quic/quic-connections.md)和[数据流](/zh/quic/quic-streams.md)。


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