Back to Browse

MAC Address Explained: I/G and U/L Bits Demystified

388 views
Sep 18, 2025
4:33

This video breaks down two tiny but powerful bits in every MAC address: the I/G bit, which tells us if it’s Unicast or Multicast, and the U/L bit, which tells us if it’s Universal or Locally assigned. If you have comments and/or questions, please feel free to comment below, and we will be happy to reply them. This video is part of a much longer series of Tutorial Videos on "Ethernet Technology": https://www.youtube.com/playlist?list=PL5qVgQLbCu-N60FYVzfsIQnafCVnyVFn3 on "MAC Address": https://www.youtube.com/playlist?list=PL5qVgQLbCu-ODy9-3-LQN2JJlgV_UpdDE and on "Computer Communication and Network Protocols": https://www.youtube.com/playlist?list=PL5qVgQLbCu-Mmm2LdLLXkS5UUhgxWRGI7 To learn more about Communications and Networks (#COMNET) protocols, subscribe to our YouTube channel: https://www.youtube.com/c/gzpapadopoulos --------------------------------------------------------------------------------------------------------------------------- Bibliography: [1] "IEEE 802 standard". [2] "Guidelines for Use of Extended Unique Identifier (EUI), Organizationally Unique Identifier (OUI), and Company ID (CID)". --------------------------------------------------------------------------------------------------------------------------- #IGbit #ULbit #MACAddress #Unicast #Multicast #LocallyAdministered #UniversallyAdministered #COMNETProtocols #EUI48Identifier #EUI64Identifier #macaddresses #MAC48 #MAC #MediumAccessControl #IEEE #ieee802 #ieee802standard #networkprotocols #Networking #ComputerNetworks #NetworkEngineering #ProtocolDesign #telecommunications #Education #TechExplained #NetworkingBasics #ITTraining #LearnNetworking

Download

0 formats

No download links available.

MAC Address Explained: I/G and U/L Bits Demystified | NatokHD