24-01-2013, 02:14 PM
FIBER DISTRIBUTED DATA INTERFACE (FDDI)
[attachment=48305]
INTRODUCTION
SHARED MEDIA NETWORK LIKE ETHERNET (IEEE 802.3) & IBM TOKEN RING (IEEE 802.5)
100 Mbps SPEED
RUNS ON OPTICAL FIBER
AMERICAN NATIONAL STANDARDS INSTITUTE (ANSI) STANDARD
SEQUENCE OF PRESENTATION
INTRODUCTION
TIMELINE FOR DEVELOPMENT OF FDDI
FDDI BASIC PRINCIPLE
FDDI PHYSICAL PROPERTIES
FDDI ARCHITECTURAL MODEL
FDDI - II
BENEFITS & LIMITATIONS
APPLICATIONS
COMPARISON WITH OTHER NETWORKS
TIMELINE FOR FDDI
PROJECT INITIATED IN OCTOBER 1982 BY JAMES HAMSTRA AT SPERRY (NOW UNISYS)
TWO PROPOSALS FOR MEDIA ACCESS CONTROL (MAC) & PHYSICAL (PHY) LAYERS SUBMITTED IN JUNE 1983
FDDI MAC BECAME AN ANSI STANDARD IN LATE 1986
FDDI PHY WON ANSI STANDARDIZATION IN 1988
FDDI - II PROPOSAL WAS MADE IN EARLY 1986
FIRST PUBLIC DEMONSTRATIONS AT ADVANCED MICRO DEVICES (AMD) IN 1989
FDDI BASIC PRINCIPLE
TOKEN RING NETWORK LIKE IEEE 802.5
TOKEN: A SPECIAL SEQUENCE OF BITS
TOKEN CIRCULATES AROUND THE RING
A STATION REMOVES THE TOKEN FROM RING BEFORE TRANSMISSION
AFTER TRANSMISSION, THE STATION RETURNS THE TOKEN TO THE RING
COLLISIONS ARE PREVENTED AS THERE IS ONLY ONE TOKEN IN THE RING
FDDI PHYSICAL PROPERTIES
DUAL-COUNTER-ROTATING TOKEN RING ARCHITECTURE
ONE RING IS PRIMARY AND THE OTHER SECONDARY
UP TO 500 STATIONS WITH A MAXIMUM DISTANCE OF 2 KM BETWEEN ANY PAIR OF STATIONS FOR MULTIMODE FIBER
WITH SINGLE-MODE FIBER THE DISTANCE CAN BE UP TO 40 KM
MAXIMUM RING LENGTH IS 100 KM (TOTAL FIBER LENGTH IS 200 KM FOR TWO RINGS)
USES 4B/5B ENCODING
[attachment=48305]
INTRODUCTION
SHARED MEDIA NETWORK LIKE ETHERNET (IEEE 802.3) & IBM TOKEN RING (IEEE 802.5)
100 Mbps SPEED
RUNS ON OPTICAL FIBER
AMERICAN NATIONAL STANDARDS INSTITUTE (ANSI) STANDARD
SEQUENCE OF PRESENTATION
INTRODUCTION
TIMELINE FOR DEVELOPMENT OF FDDI
FDDI BASIC PRINCIPLE
FDDI PHYSICAL PROPERTIES
FDDI ARCHITECTURAL MODEL
FDDI - II
BENEFITS & LIMITATIONS
APPLICATIONS
COMPARISON WITH OTHER NETWORKS
TIMELINE FOR FDDI
PROJECT INITIATED IN OCTOBER 1982 BY JAMES HAMSTRA AT SPERRY (NOW UNISYS)
TWO PROPOSALS FOR MEDIA ACCESS CONTROL (MAC) & PHYSICAL (PHY) LAYERS SUBMITTED IN JUNE 1983
FDDI MAC BECAME AN ANSI STANDARD IN LATE 1986
FDDI PHY WON ANSI STANDARDIZATION IN 1988
FDDI - II PROPOSAL WAS MADE IN EARLY 1986
FIRST PUBLIC DEMONSTRATIONS AT ADVANCED MICRO DEVICES (AMD) IN 1989
FDDI BASIC PRINCIPLE
TOKEN RING NETWORK LIKE IEEE 802.5
TOKEN: A SPECIAL SEQUENCE OF BITS
TOKEN CIRCULATES AROUND THE RING
A STATION REMOVES THE TOKEN FROM RING BEFORE TRANSMISSION
AFTER TRANSMISSION, THE STATION RETURNS THE TOKEN TO THE RING
COLLISIONS ARE PREVENTED AS THERE IS ONLY ONE TOKEN IN THE RING
FDDI PHYSICAL PROPERTIES
DUAL-COUNTER-ROTATING TOKEN RING ARCHITECTURE
ONE RING IS PRIMARY AND THE OTHER SECONDARY
UP TO 500 STATIONS WITH A MAXIMUM DISTANCE OF 2 KM BETWEEN ANY PAIR OF STATIONS FOR MULTIMODE FIBER
WITH SINGLE-MODE FIBER THE DISTANCE CAN BE UP TO 40 KM
MAXIMUM RING LENGTH IS 100 KM (TOTAL FIBER LENGTH IS 200 KM FOR TWO RINGS)
USES 4B/5B ENCODING