3.1 - Network Cables, Optical Fiber, 568A and 568B Colors, Peripheral Cables, Video Cables, SATA Device Cables, Adapters and Converters, Copper Connectors, and Fiber Connectors Flashcards
Twisted pair copper cabling
Balanced pair operation
- 2 wires with equal + opposite signals
- Transmit +/- and Receive +/-
The twist = secret
- keeps single wire moving constantly away from interference
- opposite signals compared on other end
Pairs in same cable have diff twist rates
Coaxial cables
2 or more forms share common axis
RG-6 used in TV/digital cable + high speed internet over cable
Plenum-rated cable
Traditional cable jacket
- PVC (polyvinyl chloride)
Fire rated cable jacket
- FEP (Fluorinated ethylene polymer)
- PVC (low-smoke polyvinyl chloride)
Plenum rated cable might not be as flexible
- Might not have same bend radius
Worst case planning
- Important concerns for any structure
Unshielded and shielded cable
UTP (unshielded twisted pair)
- no additional shielding
- most common twisted pair cabling
STP (shielded twisted pair)
- additional shielding protects against interference
- shield each pair and/or overall cable
- requires cable to be grounded
Abbreviations
- U = unshielded
- S = braided shielding
- F = foil shielding
Overall cable/individual pairs TP
- braided shield around cable + foil around pairs is S/FTP
- foil around cable + no shielding around pairs is F/UTP
Direct burial STP
Overhead cable = not always good option
-put cable in ground
Provides protection from elements
- water proof
- often filled with gel to repel water
- conduit might not be needed
Shielded twisted pair
- provides grounding -> adds strength
- protects against signal interference
Optical fiber communication
Transmission by light
- visible spectrum
No RF signal
- v difficult to monitor/trap
Signal slow to degrade
- transmission over long distances
Immune to radio interference -> no RF
Multimode fiber
Short range communication
- up to 2km
Inexpensive light source
- ex: LED
Single-mode fiber
Long range communication
- up to 100km without processing
Expensive light source
- commonly uses lasers
Structured cabling standards
T568A and T568B termination
USB (Universal Serial Bus)
Universal Serial Bus
Simplify connections
- printers
- storage devices
- keyboard/mouse
USB 1.1
- low speed -> 1.5 megabits/sec. 3 meters
- full speed -> 12 megabits/sec. 5 meters
USB 2.0
- 480 megabits/sec. 5 meters
USB 3.0 - Superspeed
- 5 gigabit/sec. ~3 meters
- standard doesn’t specify cable length
USB-C
USB has many diff connectors
USB C
- replaces all of them
- describes physical connector -> doesn’t describe the signal
USB versions and naming
Names keep changing
Standard doesn’t change, just the name
USB 3.1
2013
- Doubled throughout over USB 3.0
USB 3.0
- Is USB 3.1 Gen 1
- Superspeed USB-5 gbit/sec
USB 3.1
- Is 3.1 Gen 2. Superspeed +
- twice the rate of USB 3.0/USB 3.1 Gen 1
USB 3.2
USB 3.2
- 2017
- bandwidth can double with USB C cables
- uses extra lane of communication associated with the flip flop wires in USB C
USB 3.0 -> 3.1 Gen 1 -> USB 3.2 Gen 1
- Superspeed USB 5 gbps (single lane)
USB 3.1 -> 3.1 Gen 2 -> USB 3.2 Gen 2
- Superspeed USB 10 gbps (single lane)
Thunderbolt
Serial console cables
