MAC Addresses Explained | Cisco CCNA 200-301
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What is a MAC address? MAC stands for Media Access Control. It’s a unique identifier that is assigned to a network interface card, aka a NIC.
This is what a MAC address looks like 08-00-27-EC-10-61. Its a 48-bit (6-byte) address that is used for layer 2 communication.
The first thing to note is that unlike IP addresses, which and can be changed, MAC addresses are burnt into NIC buy the manufacture.
A MAC address has 2 sections. The first 24-bits is called the Organizationally Unique Identifier (OUI) and it identifies the vendor. The last 24-bits is a unique value assigned by the vendor. The result is an address that should be unique in the world.
There are three types of Mac address
Unicast - A unique mac address assigned to an interface
Multicast - An address used to send traffic to a device using a particular application/protocol.
Broadcast - An address that is sent to all devices within a local network.
Why do we need MAC addresses? When are computers are talking on the local area network or LAN, they use layer 2 communication, and layer 2 communication uses MAC addresses. When we leave our network, this is when the IP addresses are used. Routers are layer 3 devices and they mainly focus on IP addresses to get the data to the destination.
#ccna #cisco #networking
Видео MAC Addresses Explained | Cisco CCNA 200-301 канала CertBros
--------------------------------------------------------------------------------------------------------------- --~--
MY FULL CCNA COURSE
📹 Register your interest - https://www.certbros.com/Course-Interest
HOW TO PASS THE CCNA
📚 Get a great book - https://amzn.to/3f16QA5
📹 Take a video course - https://www.certbros.com/Course-Interest
✔ Use practice exams - https://www.certbros.com/ccna/Exsim
SKILLSHARE COURSES
Landing your dream job takes more than just technical skills. Skillshare is a great place to learn all the soft skills you need to be successful. Use the below link for a free 14-day trial.
📺 https://skillshare.eqcm.net/vnzRkO
THE SOFTWARE I USE TO MAKE VIDEOS
🗯 Animations - https://www.certbros.com/AfterEffects
📺 Video editing - https://www.certbros.com/PremierPro
SOCIAL
🐦 Twitter - https://twitter.com/certbros
📸 Instagram - https://www.instagram.com/certbros
👔 LinkedIn - https://www.linkedin.com/company/certbros
Disclaimer: These are affiliate links. If you purchase using these links, I'll receive a small commission at no extra charge to you.
---------------------------------------------------------------------------------------------------------------
What is a MAC address? MAC stands for Media Access Control. It’s a unique identifier that is assigned to a network interface card, aka a NIC.
This is what a MAC address looks like 08-00-27-EC-10-61. Its a 48-bit (6-byte) address that is used for layer 2 communication.
The first thing to note is that unlike IP addresses, which and can be changed, MAC addresses are burnt into NIC buy the manufacture.
A MAC address has 2 sections. The first 24-bits is called the Organizationally Unique Identifier (OUI) and it identifies the vendor. The last 24-bits is a unique value assigned by the vendor. The result is an address that should be unique in the world.
There are three types of Mac address
Unicast - A unique mac address assigned to an interface
Multicast - An address used to send traffic to a device using a particular application/protocol.
Broadcast - An address that is sent to all devices within a local network.
Why do we need MAC addresses? When are computers are talking on the local area network or LAN, they use layer 2 communication, and layer 2 communication uses MAC addresses. When we leave our network, this is when the IP addresses are used. Routers are layer 3 devices and they mainly focus on IP addresses to get the data to the destination.
#ccna #cisco #networking
Видео MAC Addresses Explained | Cisco CCNA 200-301 канала CertBros
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