Comparison Between 802.3 Ethernet 802.4 Token Bus 802.5 Token Ring

Sr No.	Parameters for Comparison	802.3 Ethernet	802.4 Token bus	802.5 Token ring
1	Physical topology	Linear	Linear	Ring
2	Logical topology	none	Ring	Ring
3	Contention	Random chance	By token	By token
4	Adding stations	A new station can be added almost anywhere on the cable at any time.	Distributed algorithms are needed to add new stations.	Must be added between two specified stations.
5	Performance	Stations often transmit immediately under light loads,but heavy traffic can reduce the effective data to nearly 0.	Stations must wait for the token even if no other station is transmitting. Under heavy load, token passing provides fair access to all stations.	Stations must wait for the token even if no other station is transmitting. Under heavy loads, token passing provides fair access to all stations.
6	Maximum delay before transmitting	None	Bounded, depending on distance spanned and number of stations.	Bounded, depending on distance spanned and number of stations.However, if priorities are used, a low priority station may have no maximum delay.
7	Maintainence	No central maintenance	Distributed algorithm provide maintenance	A designated monitor station performs maintenance.
8	Cable used	Twisted pair, co-axial fiber optic	co axial	Twisted pair and fiber optic.