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MAC 地址的全称是 **媒体访问控制地址(Media Access Control Address)**。如果说,互联网中每一个资源都由 IP 地址唯一标识(IP 协议内容),那么一切网络设备都由 MAC 地址唯一标识。
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可以理解为,MAC 地址是一个网络设备真正的身份证号,IP 地址只是一种不重复的定位方式(比如说住在某省某市某街道的张三,这种逻辑定位是 IP 地址,他的身份证号才是他的 MAC 地址),也可以理解为 MAC 地址是身份证号,IP 地址是邮政地址。MAC 地址也有一些别称,如 LAN 地址、物理地址、以太网地址等。
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