In contrast to other UUID versions, version-1 and -2 UUIDs based on MAC addresses from network cards rely for their uniqueness in part on an identifier issued by a central registration authority, namely the Organizationally Unique Identifier (OUI) part of the MAC address, which is issued by the IEEE to manufacturers of networking equipment.
与其他 UUID 版本相比，基于来自网卡的 MAC 地址的 "版本1" 和 "版本2" UUID，部分依赖于由中央注册机构发布的标识符，即 MAC 地址的组织唯一标识符（OUI）部分，由 IEEE 发布给网络设备制造商。