Lesson 2B Flashcards
What is the measurement standard for wire thickness?
American Wire Gauge (AWG)
True or False? Cat standards apply only to wiring.
False-Connectors and interconnects are also rated to cat standards.
Why is plenum-rated cable used when cable is run in an area where building air is circulated?
Plenum-rated cable produces minimal amounts of smoke if burned, must be self-extinguishing, and must meet other strict fire safety standards.
What are the different types of shielding for twisted pair cables?
Screened Twisted Pair (ScTP) or Foiled/Unshielded Twisted Pair (F/UTP): Has one thin outer foil shield around all pairs.
Shielded/Foiled Twisted Pair (S/FTP): Fully shielded with a braided outer screen and foil-shielded pairs.
Foil/Shielded Twisted Pair (F/FTP): Has a foil outer shield.
Unshielded Foil Twisted Pair (U/FTP): Has foil-shielded pairs but no outer shield.
What is the difference between T568A and T568B wiring standards?
T568A: Green pairs are wired to pins 1 and 2, and orange pairs to pins 3 and 6.
T568B: Orange pairs are wired to pins 1 and 2, and green pairs to pins 3 and 6.
Recommendation: Avoid mixing T568A and T568B standards within the same network.
What are the differences between plenum-rated and riser-rated cables?
Plenum-Rated Cables: Use fire-resistant materials and produce less smoke. Marked CMP/MMP.
Riser-Rated Cables: Designed for vertical spaces between floors, with fire-resistant properties but less stringent than plenum-rated cables. Marked CMR/MPR.
What is the purpose of shielding in coaxial cable?
Shielding in coaxial cable protects against electromagnetic interference (EMI) and provides grounding.
What are typical applications for RG-6 coaxial cables?
RG-6 is used for Cable Access TV (CATV) and broadband cable modems.
What’s the difference between solid and stranded twisted pair cables?
Solid cables have one thick wire and are used in walls, while stranded cables have many thin wires and are used for flexible connections.
What is unshielded twisted pair (UTP) cable used for?
It’s used for most office networks and runs in buildings to connect computers and phones.
What is the speed and standard for Cat 5e cables?
Standard: Cat 5e; Speed: 1 Gbps.
What is the speed and standard for Cat 6 cables?
tandard: Cat 6; Speed: 1 Gbps up to 100 meters, 10 Gbps up to 55 meters.
What is the speed and standard for Cat 6a cables?
Standard: Cat 6a; Speed: 10 Gbps up to 100 meters
What is the speed and standard for Cat 7 cables?
Standard: Cat 7; Speed: 10 Gbps up to 100 meters.
What is the speed and standard for Cat 8.1 cables?
Standard: Cat 8.1; Speed: 40 Gbps up to 30 meters.
