Autor:13.08.2024
What is a MAC Address?
A MAC address (Media Access Control) is assigned to every network interface of a device, such as a network card in a computer, laptop, smartphone, or router. It's somewhat like a registration number for the device, allowing it to be uniquely identified on a local network.
What can be read from a MAC address?
A MAC address is written in hexadecimal format (base-16), meaning it contains digits from 0 to 9 and letters from A to F. An example of a MAC address might look like this: 00:1A:2B:3C:4D:5E.
What is the purpose of a MAC address?
It is essential for communication within a single local network, also known as a broadcast domain. This means that devices on the same network can communicate with each other using their MAC addresses. Additionally, a MAC address can be used to authorize devices on a network. For example, you can configure your router or access point so that only specific devices can connect to your network using a so-called MAC address whitelist. Conversely, devices that should not have network access can be placed on a blacklist.
How can I check my MAC address?
Checking the MAC address on a Windows computer is simple. You can do this using the command prompt by typing the command ipconfig. As a result, you will see a list of all network interfaces on your computer along with their MAC addresses, which are labeled as "Physical Address."
Source: https://upload.wikimedia.org/wikipedia/commons/5/5e/Ipconfigall.png
Who assigns a MAC address?
A MAC address is unique and is assigned by the manufacturer of the network device, such as a network card.
Can a MAC address be changed?
In some situations, a MAC address can be changed to another valid hexadecimal value. This functionality is available on most modern devices, such as computers, laptops, and Android smartphones. Changing the MAC address can be useful during network testing, but it can also be used to bypass certain security measures, such as a MAC address blacklist.
Summary
A MAC address is a key element of computer networks, allowing for the identification and communication of devices within a local network. Knowing about it is essential for managing a network, authorizing devices, and diagnosing issues.
