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Parameter
value/LAN
Max. collision
domain DTE to
DTE
Max. collision
domain with
repeater
Slot time
Interframe Gap
AttemptLimit
BackoffLimit
JamSize
MaxFrameSize
MinFrameSize
BurstLimit
Table 3-4 Ethernet parameters for half duplex mode
In full-duplex operation mode, both transmitting and receiving frames are
processed simultaneously. This doubles the total bandwidth. Full duplex is much
easier than half duplex because it does not involve media contention, collision,
retransmission schedule, padding bits for short frame. The rest functions follow the
specification of IEEE802.3. For example, it must meet the requirement of minimum
inter-frame gap between successive frames and frame format the same as that in
the half-duplex operation.
Because no collision will happen in full-duplex operation, for sure, there is no
mechanism to tell all the involved devices. What will it be if receiving device is busy
and a frame is coming at the same time? Can it use "backpressure" to tell the
source device? A function flow control is introduced in the full-duplex operation.
10Base
100 meters for UTP
100 meters
412 meters for fiber
2500 meters
512 bit times
9.6us
16
10
32 bits
1518
64
Not applicable
31
100Base
100 meters for UTP
316 meters for fiber
205 meters
512 bit times
0.96us
16
10
32 bits
1518
64
Not applicable
1000Base
200 meters
512 bit times
0.096us
16
10
32 bits
1518
64
65536 bits
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