因此，新的处理器提供DMA地址转换和权限检查以实现有效的设备透传，而不是捕获并模拟对管理程序下的物理设备的访问。
So, instead of catching and emulating access to physical devices below the hypervisor, new processors provide DMA address translation and permissions checking for efficient device passthrough.
至少有一个逻辑接口与这个物理设备链接，比如en0或et0，在逻辑接口上配置IP地址。
Then, at least one logical interface will be linked to this physical device, such as en0 or et0, on which the IP address will be configured.
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。
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.
而永不变化的MAC地址给物理设备提供了一个独特可靠的地址。
The never-changing MAC provides a specific, reliable address for a physical device.
物理地址：真实的地址，其值必须被置于系统地址总线中用于选择物理存储位置或者设备。
A "real" address the value that must be placed on the system address bus to select a physical memory bank or device.
MSI的内存位置的物理地址，所以它必须转换为对设备和主机的虚拟地址空间。
The MSI memory location is a physical bus address, so it must be translated to virtual address space both on device and host.
MSI的内存位置的物理地址，所以它必须转换为对设备和主机的虚拟地址空间。
The MSI memory location is a physical bus address, so it must be translated to virtual address space both on device and host.
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