Plus those points transfer to partners like American, United, Hyatt.

此外，这些积分可以转移到美国航空、美联航、凯悦酒店等合作伙伴。

And today, we mostly covered the Transport layer, protocols like UDP and TCP, which are responsible for point to point data transfer between computers, and also things like error detection and recovery when possible.

今天，我们主要介绍了传输层，UDP 和 TCP 等协议，它们负责计算机之间的点对点数据传输，以及可能时的错误检测和恢复。