Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
10 Cards in this Set
- Front
- Back
|
Which of the following is a characteristic of fiber-optic cable?
A. It uses an intense incandescent light. B. Its core is made of highly reflective Kevlar. C. It relies on total internal cancellation to guide light for long distances. D. It is capable of higher data rates than other types of networking media. |
D. It is capable of higher data rates than other types of networking media.
|
|
|
Which of the following describes attenuation?
A. A loss of signal strength B. An increase in signal amplitude C. The delay experienced during signal travel D. The time it takes a signal to reach its destination |
A. A loss of signal strength
|
|
|
Which of the following is a cause of crosstalk?
A. Poorly terminated network cabling B. The loss of a signal's ground reference C. AC line noise coming from a nearby video monitor or hard disk drive D. FM radio signals, TV signals, carious types of office equipment |
A. Poorly terminated network cabling
|
|
|
Which of the following are tests specified by the TIA/EIA-B standard for copper cable? (Select all that apply.)
A. Signal harmonics B. Conductive response C. Wire map D. Signal absorption E. Insertion loss F. Propagation delay |
C. Wire map
E. Insertion loss F. Propagation delay |
|
|
What are three distinct kinds of crosstalk?
A. NEXT B. FEXT C. ANEXT D. SPNEXT E. PSNEXT |
A. NEXT
B. FEXT E. PSNEXT |
|
|
In designing a network, what would be used to calculate an optical link loss budger?
A. Amount of data lost during impedence mismatch events B. Amount of attenuation signal loss that can occur before data becomes corrupt C. Amount of signal power loss that can occur without dropping below receiver requirements D. Total amount of data that can be lost before regeneration of signal |
C. Amount of signal power loss that can occur without dropping below receiver requirements
|
|
|
Which numbering system uses 2 as its base?
A. Octal B. Hexidecimal C. Binary D. ASCII |
C. Binary
|
|
|
Which of the following describes a common function of a cable-testing device?
A. TDR test and detects faulty virtual circuits. B. TDR tests provide information about the location of a cabling run. C. Wire maps provide information about the distance to a cabling fault. D. Cable testers can detect open circuits in existing cabling installation. |
D. Cable testers can detect open circuits in existing cabling installation.
|
|
|
Which electronic device is used to view electrical signals such as voltage waves and pulses?
A. Multileter B. Autocollimator C. Spectrum analyzer D. Oscilloscope E. Spectroscope F. Spectophotometer |
D. Oscilloscope
|
|
|
Through wire testing, electrical interference and signal loss can be mesured. Match the names with the definitions.
A. Near-end crosstalk B. Far-end crosstalk C. Power sum near-end crosstalk D. Attenuation E. Insertion loss F. Wire map * Decrease in signal ampitude over the length of a link * Crosstalk occuring further away from the transmitter * Measures the cumulative effect of NEXT * Crosstalk signal measured from the same end of the link * Ensures that no open or short circuits exist in the cable * Combination of impedance discontinuities on a communications link and signal attenuation |
A. Near-end crosstalk
* Crosstalk signal measured from the same end of the link B. Far-end crosstalk * Crosstalk occuring further away from the transmitter C. Power sum near-end crosstalk * Measures the cumulative effect of NEXT D. Attenuation * Decrease in signal ampitude over the length of a link E. Insertion loss * Combination of impedance discontinuities on a communications link and signal attenuation F. Wire map * Ensures that no open or short circuits exist in the cable |
