一、什么是MAC地址？Part 1: What is a MAC address?

MAC address, also known as LAN address, MAC address, Ethernet address or physical address, is an address used to confirm the location of network equipment. In the OSI model, the third layer of the network is responsible for the IP address, and the second layer of the data link layer is responsible for the MAC address. If a device has one or more NICs, each NIC needs and will have a unique MAC address.

The MAC address, also known as the physical address or hardware address, is an EPROM (a flash memory chip that can usually be erased by a program) burned into a network card when the network equipment manufacturer produces it. Both the IP address and the MAC address are represented in binary in a computer, the IP address is 32 bits, and the MAC address is 48 bits.

The length of the MAC address is 48 bits (6 bytes), usually represented as 12 hexadecimal numbers, such as: 00-16-EA-AE-3C-40 is a MAC address, where the first 3 bytes, the hexadecimal number 00-16-EA represents the number of the network hardware manufacturer, which is assigned by the IEEE (Institute of Electrical and Electronics Engineers), and the last 3 bytes, the hexadecimal number AE-3C-40 represents the serial number of a network product (such as a network card) manufactured by the manufacturer. As long as you don't change your MAC address, the MAC address is unique in the world. Figuratively speaking, a MAC address is like an ID number on an ID card, which is unique. The default is usually a random MAC address, because it is more secure.

Part 2: Where is the MAC address of the Android system?

First of all, let's start with the Android system, click on the phone's "Settings" - "WLAN" - "Advanced Settings" - and finally the address in the "MAC address" column is the MAC address.

Part 3: How to fix MAC address?

1. Open Settings and find Wi-Fi settings.
2. Long press the WIFI name of the router that has been linked. (Important: The router must be the last one to be connected to the central controller.) ）
3. Modify the network - advanced settings - use the device MAC.

After fixing the MAC, find the device number, and you can contact Gefen Technology 020-34702140 to enter the next step of technical support.

If you need any technical assistance, please contact 18520481137, 18688118080 WeChat with the same number.