What Does Mac Address Stand Type for Means On Samsung TV 2022

What Does Mac Address Stand Type for Means On Samsung TV 2022

A Two-Minute Guide To Your MAC Address Updated 2022

MAC stands for Media Access Control. It is a unique identifier for network interfaces. It is used as a network address for most IEEE 802 network technologies. Sometimes it is known as the burned-in address (BIA) or the Ethernet hardware address (EHA). MAC addresses can also be used in data recovery to connect to a wireless device. Disk Drill is an app, developed by Cleverfiles, which helps in data recovery.

It searches for lost files by scanning in two possible modes, namely Quick and Deep Scan. Quick Scan uses the metadata still available in the file system. Deep Scan drills deeper into the binary level. The results are presented with the help of a filter.

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Other use cases for MAC addresses

  1. Network switches store a list of MAC addresses seen at every port and only forward packets to the ports that need to see the packet.
  2. Wireless access points often use MAC addresses for access control. They only allow access for known devices (MAC address is unique and identifies devices) with the correct passphrase.
  3. DHCP servers use the MAC address to identify devices and give some devices fixed IP addresses

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What Is A MAC Address?

The MAC address is usually assigned by the manufacturer of a Network Interface Controller (NIC), and it is stored in the hardware. The NIC is a computer circuit card that allows a computer to connect to a network. During network communication the Address Resolution Protocol (ARP) for the Internet Protocol Version 4 (IPv4) or the Neighbor Discovery Protocol (NDP) for IPv6 translates the IP into a NIC.

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The MAC address is formed in accordance to the rules of the three numbering name spaces, which are managed by the Institute of Electrical and Electronic Engineers (IEEE). The format is six sets of two digits or characters, separated by hyphens. An example of a MAC address is 30-65-EC-6F-C4-58.

Some manufacturers, such as Dell, place a unique identifier in the MAC address, which is called the Organizationally Unique Identifier (OUI), and identifies the manufacturer. The OUIs of some well-known firms are:

  • Dell: 00-14-22,
  • Cisco: 00-40-96,
  • Nortel: 00-04-DC.

Some firms may have more than one MAC address.

What Is A MAC Address Used For?

One of the applications of MAC addresses is in the filtering process on wireless networks. In order to prevent strangers from accessing a network, the router is set to accept only specific MAC addresses. In this manner, if the IP address changes, as for example in the case of dynamic IP addresses, the MAC address can still identify the device.

Filtering can be used to track network users, and to limit their access. It can also have other uses, such as identifying when a stolen device connects to the network. For these reasons, many companies and institutions require the MAC addresses of their members’ devices. Therefore, it is important for device owners not to reveal their MAC addresses to anyone, except to authorized personnel.

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Disk Drill is available for Windows and Mac computers, and can be download for free. MAC addresses are also necessary for a MAC address lookup, which means finding the geographical location of the device via the MAC address.

For the purpose of connecting to a device, and recovering its data, or setting up a filtering process, or looking up the location. It is necessary to find the MAC address of the device.

How To Find MAC Address?

If a person needs to know how to find MAC address on Windows 7, or a MAC address Windows 8, all that is necessary, is to open a cmd Window, and once the Command Prompt is opened, type in ipconfig /all and press enter. A set of labels and values will appear. The MAC address is listed under the description of Physical Address.

In a Mac computer, the process to find MAC address is as follows: go to utilities, (Finder à Utilities or Command + Shift + u) and start the Terminal app. Type networksetup –listallhardwareports. The computer will display all network interfaces and their MAC addresses (Ethernet Addresses).

In an iPhone, to find MAC address select in the home menu: Settings à General à About. The iPhone MAC address will appear under the setting WiFi Address.

How To Change The MAC Address?

In general MAC addresses cannot be modified, as they are defined by the manufacturer. However, it is possible to change IP address MAC, and use other techniques for MAC addresses.

For example, in the USA, apparently the National Security Agency has a system that can track the movement of people by using MAC addresses. This fact prompted Apple Inc. to start using random MAC addresses in their iOS, while scanning for networks.

Routing

I almost forgot to mention: there is no routing based on MAC addresses. Low level ethernet and MAC addresses can only reach every device on the same network (cabled or wireless). If you have two networks with a router in between you cannot have a device in network A send a packet to the MAC address of a device in network B. No device in network A has the MAC address of the device in network B, so a packet to this MAC address will be discarded by all devices in the network A (also by the router).

Routing is done on IP level. Simply seen the router is just doing what I described above in the section “How do IP addresses and MAC addresses work together?”. The router will receive packets for its own MAC address but for a different IP address. He will then check if he can directly reach the target IP address. If so, he sends the packet to the target. Otherwise the router itself also has an upstream router configured and will send the packet to that router.

Of course you can have multiple routers configured. Your home router will only have one upstream router configured, but in the internet backbone the big routers have big routing tables so they know the best ways for all packets.

What does MAC address stand for?

MAC ID (Media Access Control) is a unique digital number assigned to each computer on the network, more precisely not to a computer, but to a network card. The MAC address is registered on the network card when it is created in the factory. While the IP address is logical and it can be changed by the network administrator, the MAC address is on the hardware and it is permanent. It is actually used for information exchange between computers on the local network.

The MAC serial number consists of six groups of two characters separated by colons. Here is a MAC address example: 00: 1B: 44: 11: 3A: B7.

The average user, who is not a computer geek, often confuses the IP and MAC addresses and cannot clearly explain where each of them is used. In fact, they are used simultaneously but have different purposes and meanings. In short, the IP address has a strategic aim, indicating where the packet of information should be transferred globally, while the MAC address has a tactical value and it contains information regarding the nearest device to which the packet has to be transmitted.

It is important to understand that there are several MAC addresses possible. Actually, there are as many addresses as network interfaces are supported by Media Access Control. For example, you may have two different MAC address for Ethernet and for Wifi.


Why do MAC addresses exist?

The most common use of MAC address is access filtering. Based on the Mac address, the Internet service provider can control the access to the internet. The simplest example is when you connect your computer to the Internet, then decide to connect to another computer through the router connected to it, but there is no Internet. The reason is that the ISP assigned your IP address and registered the MAC address of your network card with you. As a result, there is access to the Internet only for a device with the registered MAC address.

In addition to the basic network usage, MAC addresses are often used for the following purposes:

  • Static IP: Routers allow you to assign static IP addresses to computers. When a device is connected, it always receives a specific IP address if it has a corresponding MAC address.
  • MAC address filtering: networks can use MAC address filters, allowing only devices with specific MAC addresses to connect to the network.
  • Device identification: Many Wi-Fi networks at the airport and other public Wi-Fi hotspots use the MAC address of the device to identify it. For example, the airport’s Wi-Fi network can provide a maximum of 30 minutes of the Internet for free, and then it prohibits a specific MAC address from accessing Wifi.
  • Device Tracking: Because the MAC ID is a unique number, it can be used for tracking. When you walk down the street, smartphone scan nearby Wifi networks and transmit its MAC address. For example, the “Renew London” company used trash bins in the city of London to track the movement of people in the city based on their MAC addresses.

How do you find the MAC address on macOS?

There are several ways to lookup the MAC address. First of all, you can see it on the network card package. If you have a laptop, the MAC address can be specified on the sticker on the bottom of the computer. If you didn’t find it there, then use one of the following ways to identify your MAC address:

1. Use Terminal

Open the Terminal application from Launchpad → copy and paste the command
Ifconfig and get your Mac address.

2. Use System Preferences

Open System Preferences → go to the Network section → select Wi-Fi connection → Advanced → switch to the Hardware section. You will see your Wifi MAC address there.

3. Use the Toolbar

Press Option (Alt) key and click on the Wifi icon in the toolbar. There you will see the Wifi address.

4. Use System Information

Click on the Apple icon in the Menu bar → press Option (Alt) → select System Information.

Then go to the Network section → select Locations. You will find all the information about your network, including hardware address.

How to change MAC address?

If you need to change your MAC address, for example, due to the limitations of your provider on the number of connected computers, follow our guide.

  1. Open Terminal and enter the command with the new MAC serial number (replace xx with the desired characters that you want to receive).

Please note, you can run this command only as an administrator, so you will need to enter the administrator password and click Enter. After this, the MAC address of your device will be successfully changed and valid until the next reboot of the Mac. Also, we recommend that you save your original MAC ID, as you may wish to change it back. For this, use the same command.

We should warn you that after changing the MAC address, you may face problems with the Internet connection. That’s why, if you do it for the private data security reasons, you can use another method for your security, for example, use VPN for Mac.

What are MAC addresses used for?

MAC addresses are the low level basics that make your ethernet based network work.

Network cards each have a unique MAC address. Packets that are sent on the ethernet are always coming from a MAC address and sent to a MAC address. If a network adapter is receiving a packet, it is comparing the packet’s destination MAC address to the adapter’s own MAC address. If the addresses match, the packet is processed, otherwise it is discarded.

There are special MAC addresses, one for example is ff:ff:ff:ff:ff:ff, which is the broadcast address and addresses every network adapter in the network.

How do IP addresses and MAC addresses work together?

IP is a protocol that is used on a layer above ethernet. Another protocol for example would be IPX.

When your computer wants to send a packet to some IP address x.x.x.x, then the first check is if the destination address is in the same IP network as the computer itself. If x.x.x.x is in the same network, then the destination IP can be reached directly, otherwise the packet needs to be sent to the configured router.

Up to now things seem to have gotten worse, because now we have two IP addresses: one is the original IP packet’s target address, the other is the IP of the device to which we should send the packet (the next hop, either the final destination or the router).

Since ethernet uses MAC addresses, the sender needs to get the MAC address of the next hop. There is a special protocol ARP (address resolution protocol) that is used for that. Once the sender has retrieved the MAC address of the next hop, he writes that target MAC address into the packet and sends the packet.

How does ARP work?

ARP itself is a protocol above ethernet, like IP or IPX. When a device wants to know the MAC address for a given IP address, it sends a packet to the broadcast MAC address asking “Who has IP address y.y.y.y?” All devices receive that packet, but only the one with the IP address y.y.y.y will respond with a packet “It’s me.” The asking device receives the answer and now knows that the source MAC address is the right MAC address to use. Of course the result will be cached, so the device does not need to resolve the MAC address every time.

Conclusion

media access control address (MAC address) is a unique identifier assigned to a network interface controller (NIC) for use as a network address in communications within a network segment. This use is common in most IEEE 802 networking technologies, including Ethernet, Wi-Fi, and Bluetooth. Within the Open Systems Interconnection (OSI) network model, MAC addresses are used in the medium access control protocol sublayer of the data link layer. As typically represented, MAC addresses are recognizable as six groups of two hexadecimal digits, separated by hyphens, colons, or without a separator.

MAC addresses are primarily assigned by device manufacturers, and are therefore often referred to as the burned-in address, or as an Ethernet hardware address, hardware address, or physical address. Each address can be stored in hardware, such as the card’s read-only memory, or by a firmware mechanism. Many network interfaces, however, support changing their MAC address. The address typically includes a manufacturer’s organizationally unique identifier (OUI). MAC addresses are formed according to the principles of two numbering spaces based on Extended Unique Identifiers (EUI) managed by the Institute of Electrical and Electronics Engineers (IEEE): EUI-48, which replaces the obsolete term MAC-48,[1] and EUI-64.

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