MAC address MAC的意思|示意

The address table of MAC is an important data structure in the Ethernet two-layer switch. When the switch exchanges the information, it must study and Find the MAC address with the MAC address table.

MAC地址表是以太网二层交换机中的一个重要数据结构，对MAC地址的学习和查找是实现以太网二层交换的必需功能。

The invention only learns and transmits MAC address in local network, to limit the number of MAC address, save MAC list resource of chain layer, and improve network property.

本发明使得区域网络内的MAC地址仅仅在其内部学习和传播，从而有效地限制了MAC地址的数量，节省了链路层设备的MAC表资源，避免因链路层网络的规模影响网络的性能。

A MAC address is a unique character string, and since it identifies a specific physical device — one individual NIC — the MAC address, by convention, never changes for the life of the NIC.

一个MAC地址是一个独一无二的字符串。由于它标识一个独特的物理设备——一个唯一的网卡——MAC地址，按照约定，在网卡中将永不会改变。

This is because the MAC address of a re-provisioned VM on the IBM Cloud is not the same as the MAC address of the previously de-provisioned VM even though they can have the same static IP.

这是由于 IBM Cloud 中重新配备的 VM 与以前取消配备的 VM 虽然具有相同的静态 IP，但它们具有不同的 MAC 地址。

But you have no control over what MAC addresses will be in the devices you purchase, and you normally can't alter them, so it's impossible to organize anything by MAC address.

但当你买到一块网卡时却无法控制其MAC地址的值，而且通常你还不能修改它，这就会由它引出一些事情。

This feature prevents hackers from changing the MAC address of their machine or from trying to map more than one MAC address to their machine.

这个功能会阻止黑客改变他机器的MAC地址或试图映射多个MAC地址到他的机器上。