5.3 Module 3 -- Networking Media

5.3 Module 3 -- Networking Media

• Conductors, semiconductors, & insulators
• voltage, current, resistance, impedance
• circuit elements: resistors, capacitors, inductors, active devices
• Integrated circuit manufacturing
• cables types - coax, twisted pair, (& circuit traces).
• Ethernet cables
• Fiber optics. Total internal reflection (prism)
• Fiber optic polarization & magnetic fields
• Fiber core volume (single mode):
  (4.5 ×10^-6)² ×pi×120 miles ×193121.28 meter/mile
  .0000000000636172 ×120 miles ×193121.28 meter/mile
  .001474 cubic meter OR 1474 cubic cm OR a cube 11 cm or 4.33 inches on a side.
• multi-mode & single mode fibers.
• Light sources. LED (Light Emitting Diode), Lasers - semiconductor and other. Eye hazards.
• Erbium-Doped Fiber Amplifiers (EDFAs). (Wikipedia: Erbium-doped_fiber_amplifier)
• Frequency vs color.
• instrumentation
  • voltmeter
  • ohm meter (output voltage/four terminal)
  • current meter
  • multi-meter
  • cable tester - continuity
  • RADAR - RAdio Detection And Ranging. (palindrome)
  • TDR - Time Domain Reflectometer
  • OTDR - Optical Time Domain Reflectometer, Raleigh backscatter
  • Pattern generator and error detector
  • Oscilloscope
• Who does instrumentation
  • Fluke
  • Tektronix
  • Agilent (use to be HP)
  • Centech (Harbor Freight <grin>)
  • See: http://www.tucker.com/java/jsp/cust_manufacturers.jsp
  • e-bay -- search for cable tester. (e-bay: cable+tester)
• radio waves -- attenuation reflection impedance mismatches multi-path, polarization, dispersion. Antenna systems.
• Free space optical system. (Wikipedia: Free_Space_Optics) (Wikipedia: RONJA)
• Modulation (AM, FM. PM, MFM, RLL, RZ, NRZ, NRZI ...) clock recovery.
• Spread spectrum (Wikipedia: Spread_spectrum)
• Security - Encryption, passwords, Bruce Schneier's Crypto-Gram.
  http://www.schneier.com/crypto-gram.html
• Security - Matt Blaze http://www.crypto.com/
• Summary - wired vs. fiber vs. radio (same rules & same problems)

5.3 Module 3 -- Networking Media