Network Cabling Flashcards
When an Ethernet NIC has been configured by the OS to use half-duplex, the transmit pair of the twisted-pair cable uses _____ transmissions, the receive pair in the cable uses ____ transmissions, and the twisted-pair cable uses ______ transmissions.
Simplex, simplex, half-duplex
Which kind of multiplexing assigns slots to nodes according to priority and need?
Statistical multiplexing
What kind of cable uses BNC connectors? F-connectors? Which connector is likely to be used by cable TV?
Coaxial cable, coaxial cable, F-connector
Which categories of twisted-pair cable can support Gigabit Ethernet?
Cat 5e and higher
What device can boost an analog signal? A digital signal?
Amplifier, repeater
Which part of a toner and probe kit emits a tone when it detects electrical activity on a wire pair?
Probe
What are the four fundamental properties of an analog signal?
Wave Amplitude, Wave Frequency, Wave length, Wave Phase
What does a modem do ?
A modern changes computer signals into phone line signals so that the data can travel over the telephone line.
What is twisted ratio and why is it important?
It is the number of twist per meter of foot and it is important because having the twist tight will result in better performance and minimal crosstalk.
What fiber is used in fiber-optic cabling to protect the inner core and prevent the cable from stretching?
Kevlar is used to protect the center core.
Why is SMF more efficient over long distances than MMF?
Because the laser-generated light travels a single path over the narrow core, reflecting very little.
Why do APC ferrules create less back reflection than do UPC ferrules?
By placing the end faces of the highly polished ferrules at an angle to each other.
What does a fiber cleaver do?
It is a tool used for stripping the casing off of a wirer
How is latency measured and in what unit?
By calculating a packet's RTT(round trip time),RTT is usually measured in milliseconds.
What is the difference between short circuits and open circuits?
short circuits is an unwanted connection, such as when exposed wires touch each other. And open circuits are need circuits that are missing, such as when wirer breaks.