Subscribe Now

Trending News

Blog Post

What is a MAC Address? – Definition, Structure, Types and More
Definition's

What is a MAC Address? – Definition, Structure, Types and More

MAC address Definition

You do not need to be a computer expert to know what a MAC address is. It is a unique address for devices with network capabilities. We explain what you should know about the MAC address. 

Explanation: What is a MAC address? 

  • “MAC” stands for “Media Access Control,” this address is used to identify your device.
  • The MAC address assigns to your network adapter. You need this to be able to use the Internet via LAN or WLAN.
  • The 12-digit code is displayed in the hexadecimal system and is unique to your device. The first six digits indicate from which manufacturer your network adapter is. The second six numbers represent the specific number for your device.
  • On Windows devices, the MAC address is also displayed as a “physical address,” on Apple devices as “Airport ID.”

Structure of the MAC address

The structure of the 48-bit address is precisely defined. The first two bits specify the type of speech. Among other things, they determine whether it is a multicast or broadcast address or a globally unique individual address.

Subsequently, until the end of the third byte, the manufacturer identifier of the network card or hardware follows. The bit sequence is called Organizationally Unique Identifier (OUI) and is awarded by the IEEE to the various manufacturers of the appliance.

The manufacturer specified the last three bytes of address. It assigns this bit sequence only once, thus ensuring that the complete address is unique. The spelling is usually in hexadecimal form, where hyphens or colons separate the bytes.

The different forms of representation of MAC addresses

There are various forms of representation of MAC addresses. A distinction can be in between the canonical and the bit-reversed description. The most common is the authoritative description. It consists, as already described, of a sequence of two-digit hexadecimal numbers, separated by a hyphen (sometimes also by a colon).

Less common is the bit-reversed or non-canonical form.

The function of MAC addresses in the network

The essential feature of the MAC addresses is the delivery of a frame on layer 2. If the IP destination address is in the same subnet in an IP network, the delivery is made directly to the physical address of the target computer. If the IP address belongs to another subnet, the layer two frames address to the MAC address of the responsible router (usually the default gateway).

The router is responsible for switching the packet to the next network node or the destination computer and also sends it on the following network section to a MAC address. At the same time, the router replaces the source MAC address of the source frame with its own.

Computers with multiple network interfaces have multiple MAC addresses. If the hardware of a network interface exchanges, its address also changes.

Unique MAC addresses and their function

In addition to the globally unique MAC addresses for the identification of network interfaces, addresses with special features exist. These are, for example, MAC multicast and MAC broadcast addresses. With the help of these addresses, Ethernet frames can be sent simultaneously to several or all stations of a broadcast domain.

The broadcast address in Ethernet consists of all ones and is FF-FF-FF-FF-FF-FF. Broadcasts can create a heavy burden on a network. A broadcast storm, triggered by parallel connections between switches, can paralyze the entire system.

Can you change your MAC address?

It is not the manufacturer’s intention to change a MAC address. However, with various tools or programs, this is possible so that the MAC address can vary with specific programs. For Windows operating systems, for example, there is the SMAC tool with which it can change as required.

Conclusion

Basically, you can find MAC addresses in all the electronic goods. It is not necessary to find the MAC addresses, as it is know to all the networks by default.

 

 

 

Related posts

14 Comments

  1. Basilsah

    [url=http://loprozac.info/]where purchase prozac[/url] order prozac no rx purchase prozac uk

  2. DonaldMow

    [url=http://zaycev1.top/]кредо мое скачать бесплатно mp3 зайцев нет[/url]
    слушать музыку онлайн бесплатно русские песни http://zaycev1.top/russkaya-muzyka/
    [url=http://zaycev1.top/uzbekskaya-muzyka/]скачать музыку мр3 узбекские песни[/url]
    скачать через торрент музыка 80 зарубежная http://zaycev1.top/zarubezhnaya-muzyka/
    русская клубная музыка скачать бесплатно mp3 http://zaycev1.top/klubnaya-muzyka/

  3. LarryCew

    [url=http://lolasix.info/]lasix generic[/url] buy lasix no rx purchase furosemide

  4. RachelPex

    С помощью сайта поиска партнеров для романтических встреч и секса , каждый, кто хочет , без трудности
    может найти себе интим партнера для интима и романтики.

  5. MichaelJig

    Hello dear girls!
    I spend professional eyelash extensions: classic, 2D, 3D, various effects. Eyelash extensions – the process of lengthening and increasing the volume of natural eyelashes using artificial eyelashes.
    Eyelash extensions will make your eyes a charming, seductive look from classic to Hollywood volumes. Allowing flaunting long and thick cilia around the clock for 3 weeks, without making any effort.
    You can see real photos of my work, find out the price, ask questions, sign up for the procedure and much more, on the instagram here:

  6. TimothyUnilt

    Также у iPad Air могут возникнуть такие неисправности: http://i7phone.com.ua/remont-ipad – разбит дисплей; – нет звука в наушниках или в динамике, – не заряжается или не полностью заряжается батарея; – поврежден корпус; – сломалась камера – не распознана сим-карта. Особая ситуация – если в айпад попала влага. Это очень опасно для Вашего устройства, поскольку жидкость приводит к коррозии и разрушает контакты и микросхемы. Чем больше времени прошло с момента попадания влаги, тем ниже шанс на успешный ремонт. Если такое случилось с Вашим айпад, поскорее доставьте его нашим мастерам, и мы попробуем его восстановить

  7. MildredSuelo

    Собирию по по интернету рабочие схемы по слотам.
    Если у вас есть, то давайте меняться . Мои схемы [url=best.primadors.info
    ]схемы казино[/url]
    variant3

  8. christielr69

    New super hot photo galleries, daily updated collections
    http://q.porn.xblognetwork.com/?denisse

    huge amateur cock porn videos pokemon cartoon porn videos watch blonde girl porn video dark secret porn real life free porn

  9. Basilsah

    [url=http://loprozac.info/]buy prozac medication[/url] purchase prozac no rx purchase fluoxetine

  10. LarryCew

    buy furosemide

  11. LeonelImarp

    台灣運動彩-免費賠率比較

  12. free v bucks without human verification xbox one

    Hello, I think your blog might be having browser compatibility issues. When I look at your blog site in Safari, it looks fine but when opening in Internet Explorer, it has some overlapping. I just wanted to give you a quick heads up! Other then that, amazing blog!

  13. Zofia Bergholm

    I don’t even know how I ended up here, but I thought this post was great. I don’t know who you are but definitely you are going to a famous blogger if you are not already 😉 Cheers!

  14. Dawn Torina

    I appreciate, cause I found just what I was looking for. You’ve ended my 4 day long hunt! God Bless you man. Have a nice day. Bye

Leave a Reply

Required fields are marked *