ieee 802 standards

IEEE 802 STANDARDS

Objectives

Explain the IEEE 802 networking model and related standards

Guide to Networking Essentials, Fifth Edition 2

IEEE

Institute of Electrical and Electronics Engineers

Leading developer of industry and standards in a broad range of technologies

Mission: foster technological innovation and excellence for the benefit of humanity.


802 Networking Models provides detailed implementation

specifications for a number of networking technologies Influential set of networking standards


Understanding the IEEE 802 Networking Specifications

The IEEE defined a set of LAN standards to ensure network interface and cabling compatibility Project 802 (inception on February (2) of 1980)

▪ Concentrates on standards that describe a network’s physical elements▪ NICs, cables, connectors, signaling technologies, media access

control, and the like

OSI model was not standardized until 1983–1984 IEEE 802 standards predate the model Both were developed in collaboration and are

compatible with one anotherGuide to Networking Essentials, Fifth Edition 5

IEEE 802 Specifications



IEEE 802 Specifications (continued)

LAN Issues

Medium Access Control collisions

Data Communications Protocol A protocol must also exist for

transmitting data once the node has gained control of the medium and is able to transmit.


IEEE 802 Extensions to the OSI Reference Model


IEEE 802 Extensions to the OSI Reference Model (continued)


802.3

Ethernet CSMA/CD – Carrier Sense Multiple

Access with Collision Detection Terminates transmission when it detects

collision


802.4

Token Bus Implementing a token ring protocol

on a coaxial cable Used for industrial applications Used by General Motors in their MAP

(Manufacturing Automation Protocol) Not reliable


Token Bus


802.12

Demand Priority or High Speed Networking

100Mbps Ethernet standard over Category 3UTP

Also called 100VG AnyLAN Carries both Ethernet and Token Ring


Summary

The OSI reference model and IEEE Project 802 define a frame of reference for networking and specify the lower-layer behaviors for most networks Together, these models describe the complex

processes and operations involved in sending and receiving information across a network

The OSI reference model separates networking into seven layers, each with its own purposes/activities From the bottom up: Physical, Data Link, Network,

Transport, Session, Presentation, and Application


Summary (continued)

Data frames consist of three parts: frame header, data section, and frame trailer Classified as unicast, multicast, or broadcast frames

The IEEE 802 project elaborates on the functions of a network’s Physical and Data Link layers by dividing the Data Link layer into two sublayers: Logical Link Control (LLC) and Media Access Control (MAC) Together, these sublayers handle media access,

addressing, and control and provide reliable, error-free delivery of data frames from one computer to another


ieee 802 standards

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