CSMA/CD examples Example( Ethernet) Transmission rate 10 Mbps Packet length= 1000 bits, D o=10-4sec Cable distance =1 mile, t= 5x10- sec B=5x102andE=80% Example(GEO Satellite)-propagation delay 1/4 second B=2,500andE~0% CSMA/CD only suitable for short propagation scenarios! How is Ethernet extended to 100 Mbps? How is Ethernet extended to 1 Gbps?τ β β CSMA/CD examples • Example (Ethernet) – Transmission rate = 10 Mbps – Packet length = 1000 bits, DTp = 10-4 sec – Cable distance = 1 mile, τ = 5x10-6 sec – β = 5x10-2 and E = 80% • Example (GEO Satellite) - propagation delay 1/4 second – β = 2,500 and E ~ 0% • CSMA/CD only suitable for short propagation scenarios! • How is Ethernet extended to 100 Mbps? • How is Ethernet extended to 1 Gbps? Eytan Modiano Slide 9