Transcript Jeopardy - John Rouda

Jeopardy
IST 201
Test 4 Review
What’s That
Noise?
Makin’
Waves
Media
Media
& Tests
GrabBag
100
100
100
100
100
200
200
200
200
200
300
300
300
300
300
400
400
400
400
400
500
500
500
500
500
A1A
Signals from one pair affects another
wire pair or cable
3
A1Q
What is crosstalk?
4
A2A
The slight movement of a transmission signal in time
or phase that can introduce errors and loss of
synchronization.
A2Q
What is jitter?
A3A
•Determined by injecting a signal
into a pair of wires and measuring
the signal strength on the other end
of the same pair of wires.
•Less of a problem
A3Q
•What is FEXT (far end cross talk)?
A4A
Untwisting the wires too far when
connecting the RJ45
and/or
lack of insulation
causes this.
A4Q
What is crosstalk?
A5A
Computed as the ratio in voltage amplitude
between the test signal and the crosstalk signal
when measured from the same end of the link.
It should be measured from each pair to each
other pair in a UTP link and from both ends.
A5Q
What is near-end crosstalk (NEXT)?
B1A
Repeats the same pattern at regular intervals.
Occur naturally and change regularly over time.
When graphed, no two adjacent points have the same
value.
B1Q
What is a sine wave or an analog wave?
B2A
The number of cycles of a wave each second.
B2Q
What is frequency?
B3A
They repeat the same pattern at intervals.
They do not continuously vary with time.
The represent on and off states for digital
communication.
B3Q
What are square waves or digital waves?
B4A
Light/no light
Bright/dim
B4Q
How is data represented in fiber optic cable?
B5A
Height of waves
B5Q
What is amplitude?
C1A
Shielding used in STP.
C1Q
What are braided shielding and foil
screen?
C2A
Impedance mismatch
causes these problems.
C2Q
What are reflection and jitter?
C3A
Network media that is NOT
affected by EMI and RFI.
C3Q
What is fiber optic cable?
C4A
This device shows wiring connections in an
RJ45 connector.
C4Q
What is wire map on a Fluke cable tester?
C5A
This media has few problems
with attenuation and is often
used between buildings.
C5Q
What is fiber optic cable?
D1A
Open
Split pairs
Wires are configured accurately
D1Q
What can be detected with the Fluke
cable tester and the wire map?
D2A
Long cable runs
Defective connectors
Energy leaks through cable
insulation
D2Q
What are causes of attenuation in
copper media?
D3A
The highest frequencies that a cable is
rated to support.
D3Q
What is the frequency used to measure
attenuation?
D4A
Wire map
Insertion loss
Propagation delay
…
D4Q
What are some of the tests required by
568B for copper cable?
D5A
Problems associated with impedance
mismatches in copper media.
D5Q
What are jitter and reflection?
E1A
Analog bandwidth
Digital bandwidth
E1Q
What are ways communication
systems are measured?
E2A
Transmission of signals from
one wire pair to pair in another
cable.
E2Q
What is alien crosstalk?
E3A
Combination of the effects of
attenuation and resistance on the
cable segment.
E3Q
What is insertion loss?
E4A
Measure of how long it takes a signal to
travel from one end of the cable & back
E4Q
What is propagation delay?
E5A
Property of some copper cabling that
reduces noise and causes the actual
distance that a signal travels to be longer
than the assumed length of the cable.
E5Q
What is twisting?