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;
23 Cards in this Set
- Front
- Back
|
When isolating a problem, consider the three major
areas we discussed earlier-the user, the software, and the hardware, usually in that order |
user, the software, and
the hardware, usually in that order |
|
|
to check any breaks on the
cable and the diagnostics that come with the interface card |
time domain reflectometer (TDR)
|
|
|
A diagnostic program tests
|
computer hardware and peripheral devices for correct
operation |
|
|
POST
|
poweron self tests
|
|
|
The PC tests are stored
in |
read-only memory (ROM)
|
|
|
is a product that can be used to monitor the activity of a
network and the stations on it, and to provide daily summaries or long-term trends of network usage and performance |
network analyzer
|
|
|
is the simultaneous presence of signals from two nodes on the network
|
data collision
|
|
|
To detect for a collision
|
nodes check the dc voltage
on the line. |
|
|
A hardware signal sent from a potential transmitter to a destination to indicate that the transmitter wishes to begin a transmission. If the
receiver is ready, it sends a CTS signal in return. |
RTS (ready to send)
|
|
|
A hardware signal sent from a receiver to a transmitter to indicate that the transmitter can begin sending.
|
CTS (clear to send)
|
|
|
used to test network components.
|
This equipment includes voltmeters, ammeters, volt-ohmmilliammeters, and line scanners.
|
|
|
voltage increases that last for just a short period, usually for only a few milliseconds.
|
Impulse noise
|
|
|
random background noise.
|
White noise
|
|
|
interference on one wire from
another. |
Crosstalk
|
|
|
is the ratio between the signal and noise levels at a given point, usually at the receiving end of the transmission.
|
signal-to-noise ratio (SNR)
|
|
|
digital signals have a much what SNR than analog signals.
|
higher
|
|
|
are responsible for cleaning and boosting a signal before
passing it on. |
repeaters
|
|
|
tries to minimize the effects of distortion related to signal amplitude and distortion due to envelope delay.
|
C conditioning
|
|
|
tries to minimize the effects of harmonic distortion in addition to the amplitude
and envelope delay distortions handled by type C conditioning. |
D conditioning
|
|
|
it is used to extend the
transmission range between devices that are connected directly to each other. |
line driver
|
|
|
can determine the distance the signal traveled and whether there are any shorts or opens in the cable.
|
TDR
|
|
|
is a connector that uses two prongs to pierce the cable to make its connection. When
it is used, one of the prongs can be bent and not make a proper connection. |
vampire tap
|
|
|
is the same type of connector
used to plug your telephone into the wall. When it is used, the plastic clip has a tendency to break off the connector, resulting in the plug not locking in place. |
RJ connector
|
