Local Area High Speed Networks

Tabulation of Important Ethernet Parameters

See Table 4.2 summarizes the official Ethernet MAC parameters defined for 1Mbps, 10Mbps, 100Mbps, and 1000Mbps Ethernet.

Note that most of the parameters are the same across all speeds. The interframe gap is the same when it is expressed in bit times. The only exceptional para-meter is the Gigabit Ethernet slot time. Recall that this would be relevant only if CSMA/CD Gigabit transmission were used.

Table 4.2. Ethernet MAC Parameters

Parameter	1Mbps	10Mbps	100Mbps	1000Mbps
slotTime	512 bit times	512 bit times	512 bit times	4096 bit times
interFrameGap	96s	9.6s	96s	096s
attemptLimit	16	16	16	16
backoffLimit	10	10	10	10
jamSize	4 bytes	4 bytes	4 bytes	4 bytes
maxFrameSize (without VLAN header)	1518 bytes	1518 bytes	1518 bytes	1518 bytes ...