When an Ethernet NIC has been configured by the OS to use half-duplex, the transmit pair of the cable uses___________ transmissions, the receive pair in the cable uses ___________ transmissions, and the twisted-pair in the cable uses ___________transmissions.
answer
Simplex, simplex and half-duplex
question
Which of the following is not an example of a broadband transmission?
answer
ethernet
question
Which kind of multiplexing assigns slots to nodes according to priority and need?
answer
Statistical multiplexing
question
Which type of transmission is measured by baud rate?
answer
Analog
question
What kind of cable uses BNC connectors? F-connectors? Which connector is likely to be used by cable TV?
answer
Coaxial cable, coaxial cable, and F- connector
question
Which categories of twisted-pair cable can support Gigabit Ethernet?
answer
Cat5e or higher
question
What is the earliest-pair cabling standard that meets the minimum requirements for 10Gbase-T transmissions?
answer
cat 6a
question
Which type of cross-talk occurs between wire pairs near the source of a signal?
answer
Near end cross-talk (NEXT)
question
What device can boost an analog signal? A digital signal?
answer
amplifier and repeater
question
Which part of a toner and probe kit emits a tone when it detects electrical activity on wire pair?
answer
probe
question
What are the four fundamental properties of an analog signal?
answer
Amplitude - A measure of a signal's strength
frequency - the number of times a wave's amplitude cycles
wavelength - the distance between corresponding points on the wave's cycle
phase - the progress of a wave over time
question
What does a modem do?
answer
The modem connects to your ISP, which typically provides either cable or DSL Internet service
question
What is twist ratio and why is it important?
answer
The number of twist per meter is know as twist ratio. The more twist per meter, the more it is resistant to cross talk.
question
What fiber is used in fiber-optic cabling to protect the inner core and prevent the cable from stretching?
answer
Kevlar (polymeric fiber)
question
What characteristic of optical transmissions is primarily responsible for the distance limitations of fiber-optic cabling?
answer
Cost and Optical loss
question
Why is SMF more efficient over long distances than MMF?
answer
Signals traveling over multi mode fiber experience greater attenuation than those traversing single mode.
question
Why do APC ferrules create less back reflection than do UPC ferrules?
answer
the end faces are placed at an angle to each other.
question
What does a fiber cleaver do?
answer
It is part of the Terminate fiber-optic cable process
question
How is latency measured and in what unit?
answer
The delay from when the data leave the source and when it arrives, the unit is called RTT (round trip time)
question
What is the difference between short circuits and open circuits?
answer
A short circuit is an unwanted connection, such as when exposed wires touch each other. An open circuit is one where needed connections are missing, such as when a wire breaks.
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