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Fast Ethernet (100Mbps) (Physical Layer (Reconsiliation Sublayer (RS)…
Fast Ethernet (100Mbps)
Physical Layer
Reconsiliation Sublayer (RS)
Replace PLS sublayer in 10-Mbps Ethernet
Responsible for whatever is left over, specially the passing data in 4 bit format
Encode and decode (medium-dependent)
PHY Sublayer
Transceiver responsible for encoding and decoding
Medium-Dependent Interface (MDI)
Hardware
Responsible for connecting the transceiver to the medium
Fast Ethernet: Physical Layer Implementation
100Base-TX
Media
CAT5 UTP/STP
Number of Wires
2
Maximum Length
100m
Block Encoding
4B/5B
Line Encoding
MLT-3
100Base-T4
Line Encoding
8B/6T
Media
CAT4 UTP
Block Encoding
4B/5B
Maximum Length
100 m
Number of Wires
4
100Base-FX
Media
Fiber
Number of Wires
2
Maximum Length
100m
Block Encoding
4B/5B
Line Encoding
NRZ-I
MAC Sublayer
Access method: (CSMA/CD). For full-duplex Fast-Ethernet no need CSMA/CD
Minimum frame: 64 bytes
Maximum frame: 1518 bytes
New feauture: Atonegotiation
Allow two devices to negotiate to the mode or data rate of operation.