Module 4.2

Question 1

The conductors are incorrectly wired into the terminals at one or both ends of the cable

Answer 1

Incorrect pin-out/incorrect termination/mismatched standards

Question 2

The following transpositions are common

Answer 2

Reversed pair and crossed pair

Question 3

The conductors in a pair have been wired to different terminals (for example, from pin 3 to pin 6 and pin 6 to pin 3 rather than pin 3 to pin 3 and pin 6 to pin 6).

Answer 3

reversed pair

Question 4

The conductors from one pair have been connected to pins belonging to a different pair (for example, from pins 3 and 6 to pins 1 and 2). This may be done deliberately to create a crossover cable, but such a cable would not be used to link a host to a switch.

Answer 4

Crossed pair (TX/RX reverse)

Question 5

Used to identify one cable within a bundle by applying an audible signal.

Answer 5

tone generator

Question 6

Loss of signal strength between a transmitter and receiver due to attenuation and interference measured in decibels.

Answer 6

decibel

Question 7

A ____ expresses the ratio between two values using a logarithmic scale.

Answer 7

dB

Question 8

A ________________ is a mathematical tool for performing complex multiplication and division exponential operations as simpler additions and subtractions

Answer 8

logarithm

Question 9

The maximum value allowed for insertion loss depends on the ____________ category

Answer 9

link

Question 10

Noise that occurs when a magnetic field around one electrical circuit or device interferes with the signal being carried on an adjacent circuit.

Answer 10

Electromagnetic interference (EMI)

Question 11

This measures crosstalk on the receive pairs at the transmitter end and is usually caused by excessive untwisting of pairs or faulty bonding of shielded elements

Answer 11

Near End (NEXT)

Question 12

This is the difference between insertion loss and NEXT. ACR is equivalent to a signal-to-noise ratio (SNR).

Answer 12

Attenuation to Crosstalk Ratio, Near End (ACRN)-

Question 13

Far End Crosstalk (FEXT) is measured on the receive pairs at the recipient end.

Answer 13

Attenuation-to-Crosstalk Ratio, Far End (ACRF)-

Question 14

Gigabit and 10 GbE Ethernet use all four pairs. Power sum crosstalk calculations (PSNEXT, PSACRN, and PSACRF) confirm that a cable is suitable for this type of application

Answer 14

Power Sum

Question 15

A _______________ is used to connect a PC or laptop to the command line terminal of a switch or router. The console port connection on the appliance is a standard RJ-45 jack (but wired in a different way to Ethernet).

Answer 15

Rollover Cable/Console Cable