部分厂家网卡MAC地址

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如何查看电脑网卡的MAC地址

如何查看电脑网卡的MAC地址电脑网卡的MAC地址是硬件设备的唯一标识符，用于在局域网中识别和连接设备。

在一些情况下，您可能需要查看电脑的网卡MAC地址，以便进行网络配置或故障排除。

在本文中，我们将介绍几种不同的方法来查看电脑网卡的MAC地址。

1. 使用命令提示符（Windows）-打开“命令提示符”应用程序。

您可以在开始菜单中“命令提示符”。

- 输入“ipconfig /all”并按下回车键。

此命令将显示计算机上的所有网络适配器的详细信息。

-查找以太网适配器或无线局域网适配器的“物理地址”项。

该项旁边的数值就是MAC地址。

2. 使用PowerShell（Windows）- 打开“PowerShell”应用程序。

您可以在开始菜单中“PowerShell”。

- 输入“Get-NetAdapter”并按下回车键。

这会显示计算机上的所有网络适配器的列表。

- 查找以太网适配器或无线局域网适配器的“MacAddress”项。

该项的值是MAC地址。

3. 使用系统偏好设置（Mac）-点击屏幕上方的“苹果”图标，并选择“系统偏好设置”。

-在系统偏好设置窗口中，点击“网络”。

-在网络设置窗口中，选择左侧的网络适配器（例如以太网或Wi-Fi）。

-点击右侧的“高级”按钮。

-在高级设置窗口的“硬件”选项卡中，您可以找到“MAC地址”。

该项的数值就是MAC地址。

4. 使用ifconfig命令（Linux）- 打开终端应用程序。

在大多数Linux发行版中，您可以在应用菜单中找到终端。

- 输入“ifconfig”并按下回车键。

该命令会显示所有网络接口的详细信息。

- 查找以太网适配器或无线局域网适配器的“HWaddr”项。

该项后的数值就是MAC地址。

5. 使用ip命令（Linux）-打开终端应用程序。

- 输入“ip link show”并按下回车键。

该命令将显示计算机上的所有网络接口的信息。

- 查找以太网适配器或无线局域网适配器的“link/ether”项。

如何获知本机的MAC地址

如何获知本机的MAC地址
MAC地址是Ethernet协议使用的地址。

MAC地址是Ethernet网卡上带的地址，长度为48位。

每个Ethernet网卡生产厂家必须向IEEE组织申请一组MAC地址，在生产网卡时在网卡的串行EEPROM中写入一个唯一的MAC地址。

任何两个Ethernet网卡的MAC地址，不管是哪一个厂家生产的都不应相同。

Ethernet芯片厂家不必负责MAC地址的申请，MAC地址存在于每一个Ethernet包中，是Ethernet包头的组成部分，Ethernet交换机根据Ethernet包头中的MAC源地址和MAC目的地址实现包的交换和传递。

那么我们如何知道自己机器网卡的MAC地址呢？其实很简单。

只要一两步就可以完成。

下面就让我们一步步看看吧！
我们以WINDOWSXP为例（windows98、windows2000的方法和xp的一样）。

单击“开始”菜单，点击“运行”，如下图。

弹出“运行”对话框，输入"command"命令（不包括引号），点击“确定”。

弹出如下图的窗口。

输入“ipconfig /all”,然后“回车”。

出现如下图的显示。

这样我们就可以看到本机网卡的MAC地址了。

还有其它信息。

比如：“本机IP”、“子网掩码”、“默认网关”、“DNS”等。

如何获取网卡的MAC地址

如何获取网卡的MAC地址获取网卡的MAC地址可以通过以下几种方法：1.使用操作系统提供的命令行工具：不同的操作系统提供了不同的命令行工具来获取网卡的MAC地址。

下面分别介绍Windows和Linux操作系统下的方法。

- Windows操作系统：在命令提示符或PowerShell中输入"ipconfig /all"命令，会列出所有网络接口的详细信息，包括MAC地址。

- Linux操作系统：在终端中输入"ifconfig"命令，会列出所有网络接口的详细信息，包括MAC地址。

2.使用编程语言获取：可以使用各种编程语言（如Python、Java、C++等）提供的网络编程库来获取网卡的MAC地址。

下面以Python为例，演示如何通过编程获取网卡的MAC地址：```pythonimport subprocessimport redef get_mac_address(:result = subprocess.run(["ipconfig", "/all"],capture_output=True, text=True)output = result.stdoutmac_pattern = r"Physical Address[ .]*: (.*)"mac_address = re.findall(mac_pattern, output)[0].replace("-", ":")return mac_addressmac = get_mac_addressprint(mac)```这段代码通过执行"ipconfig /all"命令，并使用正则表达式匹配输出中的MAC地址，最终返回网卡的MAC地址。

3.使用网络管理工具：可以使用一些网络管理工具来获取网卡的MAC地址，这些工具通常提供了更丰富的功能和更友好的界面，比如Wireshark、NetCut等。

MAC地址表和老化时间

MAC地址表和⽼化时间
MAC（Media Access Control, 介质访问控制）地址是识别LAN（局域⽹）节点的标识。

⽹卡的物理地址通常是由⽹卡⽣产⼚家烧⼊⽹卡的EPROM（⼀种闪存芯⽚，通常可以通过程序擦写），它存储的是传输数据时真正赖以标识发出数据的电脑和接收数据的主机的地址。

交换机之所以能够直接对⽬的节点发送数据包，⽽不是像集线器⼀样以⼴播⽅式对所有节点发送数据包，最关键的技术就是交换机可以识别连在⽹络上的节点的⽹卡MAC地址，并把它们放到⼀个叫做MAC地址表的地⽅。

这个MAC地址表存放于交换机的缓存中，并记住这些地址，这样⼀来当需要向⽬的地址发送数据时，交换机就可在MAC地址表中查找这个MAC地址的节点位置，然后直接向这个位置的节点发送。

交换机的MAC地址表就是MAC地址与端⼝对应关系的表格，当收到⽬的为这个MAC地址的帧时，则转发到对应的端⼝。

交换机中各端⼝具有⾃动学习地址的功能，通过端⼝发送和接收的帧的源地址(源MAC地址、交换机端⼝号)将存储到地址表中。

⽼化时间是⼀个影响交换机学习进程的参数。

从⼀个地址记录加⼊地址表以后开始计时，如果在⽼化时间内各端⼝未收到源地址为该MAC地址的帧，那么，这些地址将从动态转发地址表中被删除。

静态MAC地址表不受地址⽼化时间影响。

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mac地址表默认⽼化时间300秒，可以通过命令进⾏修改：mac address-table aging-time xxx。

部分厂家网卡MAC地址

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以太网地址(MAC)

以太网地址(MAC)
2010-02-06 2:28
以太网采用介质访问控制(Medh Access Control,MAC)地址进行寻址,MAC地址被烧人每个以太网网卡(Network Interface Card,NIC)中。

MAC地址也叫硬件地址,它采用48位(6字节)的十六进制格式。

组织唯一标识符(OUI)是由IEEE分配给单位组织的,它包含24位(3字节)。

各个单位组织依次被分配一个全局管理地址(24位,或3字节),对于厂家生产的每一块网卡来说,这个地址是唯一的(当然,这不能完全保证)。

请仔细看一看图,高位是individual/Group(VG)位,当它的值为0时,就可以认为这个地址实际上是设备的MAC地址,它可能出现在MAC报头的源地址部分。

当它的值为1时,就可以认为这个地址表示以太网中的广播地址或组播地址,或者表示TR和FDDI中的广播地址或功能地址。

下一位是G/L位(也称为U/L,这里的U表示全局)。

当这一位设置为0时,就表示一个全局管理地址(由IEEE分配),当这一位为1时,就表示一个在管理上统治本地的地址
(就像在DECnet中一样)。

以太网地址的后24位表示本地管理的或厂商分配的代码。

厂家制造的第一块网卡的这一部分地址通常以24个0开头,最后-块网卡则以24个1结束(共有16777216块网卡)。

在实际中可以发现,许多厂商使用同样的6个十六进制数字,作为同一块网卡上序列号的最后6个数字。

为什么要修改MAC地址,及修改方法

假设我的网卡是ne2000，找到NE2000与NE20001的键值(不知道怎么回事，我这里关于NE2000的键有两个，为保险，都做如下修改），在Parameters项里添加字串值：
名称：NetworkAddress
数据：“004040404040” （这里就是你要改的mac值，可自己随便填12位）
3、4步骤用于在网络属性的网卡属性中添加相应高级属性。
********************************************************
WinNT下改网卡地址的方法：
打开注册表，
HKEY_LOCAL_MACHINE->SYSTEM->CurrentControlSet->Services
改MAC地址有什么用呢？大都是学网络的吧！
一来有些公司做的软件是认MAC地址的，有的是从网卡上的EEPROM中读取，有的仅仅是从注册表读取（比如Cadence公司某些电路设计软件），对于后者，破起来太简单了！而对前者呢，只能跑到大街上买块驱动加参数就可以改写EEPROM中MAC地址的网卡了，听我一个同学讲Realtek也提供了程序改写EEPROM。Good!
1、首先打开注册表，找到
HKEY_LOCAL_MACHINE/system/Currentcontrolsetservices/classeset000、0001、0002等下，观察DriverDesc内容为你要修改的网卡的描述。
2、在其下，添一个字符串，名字为NetworkAddress，值设为你要的MAC地址，要连续写。如004040404040。
真修改有几种方法，比如用厂商的程序修改网卡中的eprom
有的网卡还可以在驱动程序安装时就进行修改的。

如何获取网卡的MAC地址

如何获取网卡的MAC地址获取网卡的MAC地址是一个常见的需求，在不同的操作系统中，可以使用不同的方法来获取。

下面将分别介绍在Windows、macOS和Linux系统中获取网卡MAC地址的方法。

在Windows系统中，可以通过以下步骤来获取网卡的MAC地址：1.打开「开始菜单」，在栏中输入「命令提示符」并打开命令提示符窗口。

2. 在命令提示符窗口中输入「ipconfig /all」并按下回车键。

3.系统会列出所有的网络适配器信息，包括网卡的物理地址（MAC地址）。

在相应的网络适配器部分，查找「物理地址」或「MAC地址」字段，即可找到对应的MAC地址。

在macOS系统中，可以通过以下步骤来获取网卡的MAC地址：1.打开「应用程序」文件夹，找到「实用工具」文件夹并进入。

2.打开「终端」应用程序。

3. 在终端中输入「ifconfig」并按下回车键。

4. 终端会列出所有的网络适配器信息，包括网卡的物理地址（MAC地址）。

在相应的网络适配器部分，查找「ether」字段，即可找到对应的MAC地址。

在Linux系统中，可以通过以下步骤来获取网卡的MAC地址：1.打开终端应用程序。

2. 输入以下命令并按下回车键：「ifconfig -a」或「ip link」。

3. 终端会列出所有的网络适配器信息，包括网卡的物理地址（MAC 地址）。

在相应的网络适配器部分，查找「ether」字段，即可找到对应的MAC地址。

除了以上的方法，还可以通过编程的方式来获取网卡的MAC地址。

不同编程语言提供了相应的API或库函数来获取网卡信息。

以下是使用Python编程语言获取MAC地址的示例代码：```pythonimport uuiddef get_mac_address(:mac = uuid.getnodemac_str = ':'.join(("%012X" % mac)[i:i+2] for i in range(0, 12, 2))return mac_strmac_address = get_mac_addressprint(mac_address)```这段代码使用了Python的uuid库中的getnode函数来获取网卡的MAC地址。

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