Module 5 / Unit 2 Installing Cabled Networks Flashcards
On completion of this unit, you will be able to: □ Understand the use of wiring standards when selecting cable for different applications. □ Describe the types and properties of different cables and connectors (Twisted Pair, Coax, Fiber Optic, Serial). □ Understand the use of transceivers and media converters. □ Identify appropriate tools for network hardware installation and testing.
What is the measurement standard for wire thickness?
American Wire Gauge (AWG).
What is crosstalk?
Signal leakage between adjacent conductors within a single cable or between adjacent cables.
Which categories of unshielded twisted pair cables are certified to carry data transmission faster than 100 Mbps?
Cat 5e, Cat 6 / 6A, and Cat 7.
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.
100BASE-T transmit pins are 1 and 2. What color-code are the wires terminated to these pins under T568A and T568B
Green / White (pin 1) and Green (pin 2) for T658A or Orange (pin 1) / White and Orange (pin 2) for T568B.
Patch cables are vulnerable to failure because they frequently trail from the PC to the wall socket. What bit of equipment would you use to check that a cable is physically intact?
Cable tester.
Which pins are used for the receive pair under 100BASE-T?
3 and 6.
What cabling faults would a wire map tester detect?
Opens, shorts, and transpositions (reversed and crossed pairs).
How would you test for excessive attenuation in a network link?
Measure the insertion loss in dB using a cable tester.
What is the reason for making power sum crosstalk measurements when testing a link?
Power sum crosstalk measures cable performance when all four pairs are used, as Gigabit and 10G Ethernet do.
Which cable type consists of a core made of solid copper surrounded by insulation, a braided metal shielding, and an outer cover?
Coax.
What surrounds the core of optical fibers in fiber optic cable?
Cladding
What type of fiber optic cable is suited for long distance links?
Single Mode.
What device enables termination of different patch cord types in an appliance such as a switch or router?
A transceiver or interface converter such as a GBIC, SFP, SFP+, or QSFP
