Troubleshooting Cable Connectivity Flashcards
1
Q
Theoretical maximum data rate- Usually measured in bits per second - The size of the pipe
A
Speed/bandwidth
2
Q
- Amount of data transferred in a given timeframe - Usually measured in bits per second- How much water is flowing through the pipe
A
Throughput
3
Q
Unshielded and shielded cable
A
- Abbreviations-
U = Unshielded,
S = Braided shielding,
F = Foil shielding
4
Q
(Overall cable) / (individual pairs)TP
A
- Braided shielding around the entire cable
and foil around the pairs is S/FTP- Foil around the cable and no shielding around
the pairs is F/UTP
5
Q
- cable may not be as flexible - May not have the same bend radius
used in areas where fire is a higher risk
A
Plenum-rated
6
Q
- Cisco console cable,- Yost cable- Serial cable “standard” proposed by Dave Yost
- A standard for RJ-45 to serial communications
- Used in conjunction with serial port connectors
A
“Rollover” cable
7
Q
- Power provided on an Ethernet cable- One wire for both network and electricity - Phones, cameras, wireless access points - Useful in difficult-to-power areas
A
Power over Ethernet (PoE)
8
Q
Signal strength diminishes over distance- Loss of intensity as signal moves through a medium
A
Attenuation
9
Q
- Signal strength ratio measurements- One-tenth of a bel- Capital B for Alexander Graham Bell
A
Decibels (dB)
10
Q
dB loss symptoms
A
- No connectivity - No signal!
Intermittent connectivity- Just enough signal to sync the link
Poor performance- Signal too weak- CRC errors, data corruption
11
Q
pinch connector onto a wire
A
cable crimpers
12
Q
punch a wire into a wiring block
A
punch down tool
13
Q
generates a tone to find where wires go
A
tone generator
14
Q
useful for testing physical ports
not cross over cable
used on 1 device
A
loopback plug
15
Q
shows cable lengths
id splices
shows signal loss
locates breaks
A
TDR time domain reflectometer
