mac地址扩展符
发布时间2021-04-15 所属分类:MAC地址申请mac地址申请方面知倍客对于mac地址扩展符方面也有相应的理解,mac地址使用方面是12位数字和字母组成的,但是在扩展字符方面就不是12位了
扩展标识符(EUI)是48位扩展标识符(EUI-48)或64位扩展的标识符(EUI-64)。 在某些例外情况下,尤其是在协议标识符方面,并绑定到需要标识的硬件设备实例或其他对象。 EUI-48和EUI-64标识符常用作各种标准中指定的全局网络地址(有时称为MAC地址)。 例如,EUI-48通常用作根据IEEE Std 802的硬件接口的地址,历史上使用的名称是“ MAC-48”。 作为另一个示例,根据IEEE Std 1588,EUI-64可以用作时钟的标识符。IEEEStd 802还指定EUI-64用于64位全局网络地址。 下面提供有关EUI-48和EUI-64的更多详细信息。
An Extended Unique Identifier (EUI) is either a 48-bit Extended Unique Identifier (EUI-48) or a 64-bit Extended Unique Identifier (EUI-64). With some exceptions, particularly with regard to protocol identifiers, each EUI is intended to be globally unique and bound to a hardware device instance or other object that requires unique identification. EUI-48 and EUI-64 identifiers are most commonly used as globally unique network addresses (sometimes called MAC addresses), as specified in various standards. For example, an EUI- 48 is commonly used as the address of a hardware interface according to IEEE Std 802, historically using the name “MAC-48”. As another example, an EUI- 64 may serve as the identifier of a clock, per IEEE Std 1588. IEEE Std 802 also specifies EUI-64 use for 64-bit globally unique network addresses. Further detail regarding EUI-48 and EUI-64 is provided below.
当EUI用作MAC地址(例如,IEEE 802网络地址)时,初始八位位组(八位位组0)的两个低有效位用于特殊目的。 八位位组0的低有效位(I / G位)指示单个地址(I / G = 0)或组地址(I / G = 1),八位位组0的第二低位有效位(U / L) 位)表示地址的通用(U / L = 0)或本地(U / L = 1)管理。 通用管理的地址旨在成为全局的地址。
When an EUI is used as a MAC address (for example, an IEEE 802 network address), the two least significant bits of the initial octet (Octet 0) are used for special purposes. The least significant bit of Octet 0 (the I/G bit) indicateseither an individual address (I/G=0) or group address (I/G=1), and the second least significant bit of Octet 0 (the U/L bit) indicates universal (U/L=0) or local (U/L=1) administration of the address. A universally administered address is intended to be a globally unique address.
知倍客可以在1-2个工作日内帮助企业申请下来mac地址的。并且保证是的,可以在网上查询到。对于很多一些网站上公布的mac地址和IEEE网不一样,一切以IEEE网为准。
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