Physical Media: coax, fiber

Coaxial cable:

• wire (signal carrier) within a wire (shield)

  • baseband: single channel on cable
  • broadband: multiple channel on cable

• bidirectional

• common use in 10Mbs Ethernet

Fiber optic cable:

• glass fiber carrying light pulses

• high-speed operation:
  • 100Mbps Ethernet
  • high-speed point-to-point transmission (e.g., 5 Gps)

• low error rate

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