Cables Flashcards
Used in plenum spaces
Plenum cabling
Adhere to a fire safety standard of NFPA 90A
Made from fire retardant plastic which is a low smoke polyvinyl chloride and fluorinated ethylene polymer.
Less flexible
Plenum cabling
2 types of Category 6 cables
Cat6
Cat6a (augmented)
Cable that is backwards compatible, has stricter specifications, and a faster speed over ethernet lines.
Cat6
How fast is Cat6 cables?
10GBASE - T
2 types of Category 5 cables
Cat5
Cat5e (extended)
What are the two speeds of cat5 cables?
100BASE-T
1000BASE-TX
Which cat5 is guaranteed for a distance of 100m?
1000BASE-TX
Cable internal Scheme:
gGoBbObrBr
T-568A
Cable internal scheme:
oOgBbGbrBr
T-586B
Equal but opposite signals travel on each pair member
Differential signaling
Found on twisted pair cabling
What is balanced pair operation
Differential signaling
receiver examines differences between cables, determines what is noise and cancels it
How is unshielded twisted pair protected from emi?
plastic sheath only
How is shielded twisted pair protected from emi?
Jacket
shield braid
shield foil
may have a ground wire
data transmission by using pulses of light
fiber optics
What is the basic design of a fiber optic cable?
Outer Jacket Strength member Coating Cladding Core
Which type of fiber optic cable is more expensive, but better for longer distances?
Single mode
Which type of fiber optic cable has sharp refraction by cladding?
Multi-mode step index
What are the three types of fiber optic cabling?
Single mode
multi-mode: step index
Multi-mode: graded index
What is the design of a coaxial cable?
Outer jacket Braided shield Foil Shield Dielectric Center Conductor
What are the 2 types of coaxial cables?
RG-6
RG-59
This cable is suitable for radio
Commonly used by cable companies
Suitable for longer distances and higher bandwidth
Has a larger core
Coaxial RG-6
This cable has shorter distances and lower bandwith
Is commonly used as a patch cable between devices
Has a smaller core
Coaxial RG-59
Benefits of coaxial cable
Multiple channel support
lower error rates than twisted cable
high capacity for bandwith
rigid design
Limitations of coaxial cable
signal leakage
noise from external fields
ground loops
Cable type: Unshielded 10/100 Mbps 100 MHz Not good for large corporations Prone to EMI and cross talk
Cat5
Cable type: Unshielded 1000 Mbps/ 1Gbps 100 MHz More expensive Less cross-talk
Cat5e
Cable type: Shielded or unshielded 1000 Mbps/ 1Gbps >250 MHz Length limit of 55 m or 33 m
Cat6
Cable type:
Shielded
10000 Mbps/ 10 Gbps
500 MHz
Cat6e