- DCN Tutorial
- Data Comm & Networks Home
- DCN - Overview
- DCN - Computer Network Types
- DCN - Network LAN Technologies
- DCN - Computer Network Topologies
- DCN - Computer Network Models
- DCN - Computer Network Security
- Physical Layer
- DCN - Physical Layer Introduction
- DCN - Digital Transmission
- DCN - Analog Transmission
- DCN - Transmission media
- DCN - Wireless Transmission
- DCN - Multiplexing
- DCN - Network Switching
- Data Link Layer
- DCN - Data Link Layer Introduction
- DCN - Error detection and Correction
- DCN - Data Link Control & Protocols
- Network Layer
- DCN - Network Layer Introduction
- DCN - Network Addressing
- DCN - Routing
- DCN - Internetworking
- DCN - Network Layer Protocols
- Transport Layer
- DCN - Transport Layer Introduction
- DCN - Transmission Control Protocol
- DCN - User Datagram Protocol
- Application Layer
- DCN - Application Layer Introduction
- DCN - Client-Server Model
- DCN - Application Protocols
- DCN - Network Services
- DCN Useful Resources
- DCN - Quick Guide
- DCN - Useful Resources
Organizationally Unique Identifier
Organizationally unique identifier (OUI) refers to a 24-bit number assigned to a manufacturer or a vendor of a network device or station. They are globally unique identifiers assigned by the Institute of Electrical and Electronics Engineers (IEEE) Registration Authority.
OUI are typically used for uniquely identifying a particular device connected to the computer network through derived identifiers like the Medium Access Control (MAC) addresses. MAC addresses are of 6 octets ( 48-bits ). Among these, the first three octets of the addresses constitutes the OUI.
A 3-octet OUI is generally represented in hexadecimal notation separated by dashes (for example, 1F – 9E – A0) or by colons (for example, 1F : 9E : A0). However, there are other representations too.
The following figure depicts OUI in a MAC address −
- Related Articles
- Getting the unique identifier for the current managed thread in C#
- JavaScript this Identifier
- __func__ identifier in C
- Order MySQL results without identifier?
- Predefined Identifier __func__ in C
- Difference Between Identifier and Variable
- Difference Between Keyword and Identifier
- What is a Virtual Circuit Identifier (VCID)?
- What is an identifier in C language?
- What are the principles of security identifier?
- Determine if a String is a legal Java Identifier
- What is an identifier and its rules in C language?
- How can we use the MySQL reserved words as an identifier?
- Check whether the given string is a valid identifier in Python
- What is the maximum length of each type of identifier in MySQL?
