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Chapter 4A: OSI-Physical Layer (Network Media (STP Cable (Braided or Foil…
Chapter 4A:
OSI-Physical Layer
Physical Layer Protocols
The Physical Layer
Physical Layer Fundamental Principles
Physical Layer Media
Bandwidth
Network Media
STP Cable
Braided or Foil Shield
Foil Shields
Outer Jacket
Twisted Pairs
Copper Media Safety
Connected correctly
Installations must be inspected for damage
Data and Electrical Power Cabling must comply with safety codes
Equipment must be grounded
UTP Cable
Twisted-Pair
Color-Coded Plastic Insulation
Outer Jacket
Properties of UTP Cable
Limiting the negative effects of crosstalk by Cancellation and Varying the number of twist per wire pair.
Copper Media
STP Cable (Shielded Twisted Pair Cable)
Coaxial Cable
UTP Cable (Unshielded Twisted Pair Cable)
UTP Cabling Standards
Cat 5 100-1000 Mbps and Cat 5e 1000 Mbps
Testing UTP Cables
Cable Length
Signal loss due to attenuation --> >100m
Wiremap
Crosstalk
Properties of Fiber Optic Cabling
Types of Wireless Media
Wi-Fi -802.11
Bluetooth -802.15
Wi MAX -802.16
Fiber versus Copper
Immunity to Electrical Hazards
Installation Skills
Immunity to EMI and RFI
Safety Precautions
802.11 Wi-Fi Standards