Chapter 4 Flashcards
5 Basic Communication Media Types
Coaxial Cable Wireless Hybrid Fiber Optic Twisted Pair
Categories of Unshielded
3 4 5 5e 6 6a 6e 7 7a
Types of Interferences
EMI (Electromagnetic Interference)
RFI (Radio Frequency Interference)
Backbone Cabling
Main cable in your network; transfers main data between circuits
Plenum Cable
Does not emit a toxic vapor when burned through
Impedance
Restricts flow of currents, if there are no currents then there is no impedance
Coaxial Cable
2 types:
- thick: used as backbone
- thin: used to connect computers (no one uses anymore)
MAU
Media Access Unit
Allows computers to connect to coaxial cable
10Base5
10=cable transmission rate
Base=baseband connection
5=500 meters for cable run (distance)
Twisted Pair
Twisting reduces EMI and RMI 2 types: - Unshielded - Shielded Twisted uses RJ-45 connector
Shielded (STP)
Further reduces EMI and RFI
Unshielded (UTP)
No shielding between wires and encasement
Fiber Optic Cable
Used for cable backbone Advantages: - Multimode transmission capacity (high capacity) - No EMI or RFI - Low attenuation - Long distance - Secure against taping
Attenuation
When signal gets lost during travel
Horizontal Cabling
Cable that lays out on the floor
Connects workstation to server