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An organizationally unique identifier (OUI) is a 24-bit number that uniquely identifies a vendor, manufacturer, or other organization.. OUIs are purchased from the Institute of Electrical and Electronics Engineers (IEEE) Registration Authority by the assignee (IEEE term for the vendor, manufacturer, or other organization).
The Individual Address Block (IAB) is an inactive registry which has been replaced by the MA-S (MAC address block, small), previously named OUI-36, and has no overlaps in addresses with the IAB [6] registry product as of January 1, 2014. The IAB uses an OUI from the MA-L (MAC address block, large) registry, previously called the OUI registry.
In contrast to other UUID versions, version-1 and -2 UUIDs based on MAC addresses from network cards rely for their uniqueness in part on an identifier issued by a central registration authority, namely the Organizationally Unique Identifier (OUI) part of the MAC address, which is issued by the IEEE to manufacturers of networking equipment. [14]
The term message integrity code (MIC) is frequently substituted for the term MAC, especially in communications [1] to distinguish it from the use of the latter as media access control address (MAC address). However, some authors [2] use MIC to refer to a message digest, which aims only to uniquely but opaquely identify a single message.
The [1] IEEE Registration Authority is the administrative body that is responsible for registering and administering organizationally unique identifiers (OUI) and other types of identifiers which are used in the computer and electronics industries (Individual Address Blocks (IAB), Manufacturer IDs, Standard Group MAC Addresses, Unique Registration Numbers (URN), EtherType values, etc.)
Each basic service set has a unique identifier, a BSSID, which is a 48-bit number that follows MAC address conventions. [4] An infrastructure BSSID is usually non-configurable, in which case it is either preset during manufacture or mathematically derived from a preset value such as a serial number or a MAC address of another network interface.
PLT—Power Line Telecommunications; PMM—POST Memory Manager; PNG—Portable Network Graphics; PnP—Plug-and-Play; PNRP—Peer Name Resolution Protocol; PoE—Power over Ethernet; PoS—Point of Sale; POCO—Plain Old Class Object; POID—Persistent Object Identifier; POJO—Plain Old Java Object; POP—Point of Presence; POP3—Post Office ...
The SNAP address identifies, at each MAC SAP, a single LSAP. Thus, each protocol using SNAP must employ a protocol identifier. Thus, the Subnetwork Access Protocol (SNAP) is a mechanism for multiplexing, on networks using IEEE 802.2 LLC , more protocols than can be distinguished by the 8-bit 802.2 Service Access Point (SAP) fields.