Section 5.2 Flashcards
What is the term that describes the diminishing strength of signal on a cable?
Attenuation
Which is more fire resistant? Plenum or Riser-rated cables?
Plenum
Where are Riser-rated cables used?
vertical spaces and where breathing air isn’t circulated
What are Rollover cables used for?
connecting to a console port
What’s another name for a rollover cable?
Console cable
What are 2 connectors that are used in older devices for device management?
DB-9 and DB-25
In what unit is signal loss measured?
decibel (dB)
What is the signal increase/decrease for these measurements?
+3 dB
+10 dB
+20 dB
-3 dB
-10 dB
-20 dB
gain x2
gain x10
gain x100
loss x2 (half)
loss x10 (one tenth)
loss x100 (one hundredth)
What symptoms do incorrect pinouts cause?
no communication,
reduced performance,
or CRC errors
What is Incorrect Pinout?
when the wiring does not match a standard
What does it mean if there is no link light at a port?
speed mismatch or faulty cable
What’s the difference between a short circuit and an open circuit?
short: wires touching
open: no wires touching
What’s the best thing to do if a cable is too difficult to repair?
replace it
What 2 configurations need to be checked to prevent incorrect tranceivers from being used?
mode (single/multi)
and
wavelength
What device types use MDI ports vs MDIX ports?
end devices use MDI
network devices use MDIX
