Figure 4-2: Ethernet Physical Layer Standards Continued Fiber Physical Speed Maxim um Medium Layer Run 850 nm light (inexpensive) Standards Length Multim ode fiber 1000BASE-SX 1 Gbps 220m 62.5 160 microns MHz-km 1000BASE-SX 1 Gbps 275m 62.5 200 1000BASE-SX1 Gbps 500m 50 400 1000BASE-SX 1 Gbps 550m 50 500 The 1000BASE-SX standard dominates trunk links today Carriers use 1310 and 1550 nm light and single-mode fiber 4-104-10 Fiber Physical Layer Standards Medium 850 nm light (inexpensive) Multimode fiber Maximum Run Length Speed 1000BASE-SX 1 Gbps 275 m 1000BASE-SX 1 Gbps 500 m 1000BASE-SX 1 Gbps 220 m 1000BASE-SX 1 Gbps 550 m Figure 4-2: Ethernet Physical Layer Standards, Continued 62.5 microns 160 MHz-km 62.5 200 50 400 50 500 The 1000BASE-SX standard dominates trunk links today. Carriers use 1310 and 1550 nm light and single-mode fiber