It can also help locate a lost iPhone because it is able to determine a smartphone's MAC address.

它还可以帮助定位丢失的iPhone，因为它能够确定智能手机的MAC地址。

To solve this problem, Ethernet requires that each computer has a unique Media Access Control address, or MAC address.

为了解决这个问题，以太网要求每台计算机都有一个唯一的媒体访问控制地址，即 MAC 地址。

It does this by keeping a list of what MAC addresses are on what side of the network.

它通过保留网络哪一侧的 MAC 地址列表来实现这一点。

This works really well; every computer made today comes with its own unique MAC address for both Ethernet and WiFi.

这真的很好用；今天制造的每台计算机都有自己唯一的以太网和 WiFi MAC 地址。

MAC addresses, collision detection, exponential backoff and similar low level protocols that mediate access to the physical layer are part of the Data Link Layer.

MAC 地址、冲突检测、指数退避和调解对物理层的访问的类似低级协议是数据链路层的一部分。