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Local Area High Speed Networks by Dr. Sidnie Feit

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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
Parameter1Mbps10Mbps100Mbps1000Mbps
slotTime512 bit times512 bit times512 bit times4096 bit times
interFrameGap96s9.6s96s096s
attemptLimit16161616
backoffLimit10101010
jamSize4 bytes4 bytes4 bytes4 bytes
maxFrameSize (without VLAN header)1518 bytes1518 bytes1518 bytes1518 bytes ...

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