physical device address

基本解釋

The never-changing MAC provides a specific, reliable address for a physical device.
而永不變化的MAC地址給物理設(shè)備提供了一個(gè)獨(dú)特可靠的地址。
Each guest operating system is mapped through the /dev/kvm device, having its own virtual address space that is mapped into the host kernel's physical address space.
每個(gè)來(lái)賓操作系統(tǒng)都是通過(guò) /dev/kvm 設(shè)備映射的，它們擁有自己的虛擬地址空間，該空間映射到主機(jī)內(nèi)核的物理地址空間。
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.
一個(gè)MAC地址是一個(gè)獨(dú)一無(wú)二的字符串。由于它標(biāo)識(shí)一個(gè)獨(dú)特的物理設(shè)備——一個(gè)唯一的網(wǎng)卡——MAC地址，按照約定，在網(wǎng)卡中將永不會(huì)改變。

Security solutions based on physical infrastructure, and policy expressed in terms of a particular device, the corporate PC, an IP address, network port, or application protocol are becoming useless in a mobile, borderless world.
FORBES: Going Mobile: Security in the Age of Ubiquity