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 址、冲突检测、指数退避和调解对物理的访问的类似低级协议是数据链路的一部分。

Number one category is of the people who see  you in the misery in pain and the backoff, they're like we are gone. We can't handle  it. I respect them for their honesty.

第一类是那些在痛苦和退缩中看到你的人，他就走了一样。 无法处理。 尊重他的诚实。