Chapter 5 Review

Which of these categories of twisted-pair cable can support Gigabit Ethernet?

Cat 5e, Cat 6a, Cat 7

What kind of cable uses BNC connectors? Which connector is likely to be used by cable TV?

Coaxial cable, F-connector

What type of fiber cable problem is caused when pairing a 50-micron core cable with a 62.5-micron core cable?

Fiber type mismatch

Suppose you're creating patch cables to be used in a government office. What color wire goes in the first pin?

White/green

What is a twist ratio, and why is it important?

it is the number of twists per foot. It is important because t he number of twists per foot in a pair of wires translates to the more resistant the pair will be to cross-talk or noise.

What fiber is used in fiber-optic cabling to protect the inner core and prevent the cable from stretching?

kevlar

What is the difference between short circuits and open circuits?

short circuit is an unwanted connection, like exposed wires touching. Open circuit is one where needed connections are missing, like wire breaks.

Why is SMF more efficient over long distances than MMF?

signals traveling over MMF experience greater attenuation that those on SMF

Which fiber connector contains two strands of fiber in each ferrule?

MTRJ

How is latency measured, and in what unit?

RTT (round trip time), and in milliseconds.

Which fiber transceiver is the same size as SFP transceivers, but can support network speeds over 10 Gbps?

SFP+

Which part of a toner and probe kit emits an audible tone when it detects electrical activity on a wire pair?

Tone locator

What kind of tool can measure the distance to the location of damage in a cable?

cable performance tester

What characteristic of optical transmissions is primarily responsible for the distance limitations of fiber-optic cabling?

cost and optical loss

Why do APC ferrules create less back reflection than UPC ferrules?

the end faces are placed at an angle to each other

What is the earliest twisted-pair cabling standard that meets the minimum requirements for 10GBase-T transmissions?

Cat 6a

Which kind of crosstalk occurs between wire pairs near the source of the signal?

NEXT

Which kind of multiplexing assigns slots to nodes according to priority and need?

STDM (statistical time division multiplexing)

Suppose you're assisting with a cable installation using fiber-optic cabling that will support Gigabit Ethernet. You're approved to install segments up to 4000 m in length. What kind of cable are you using?

a single mode fiber cable

Which transmission characteristic is never fully achieved?

Bandwidth