Network + Ch 5 RQ

Which categories of twisted-pair cable can support Gigabit Ethernet?

Cat5e or higher

What does a fiber cleaver do?

It is part of the Terminate fiber-optic cable process

What fiber is used in fiber-optic cabling to protect the inner core and prevent the cable from stretching?

Kevlar (polymeric fiber)

Which type of cross-talk occurs between wire pairs near the source of a signal?

Near end cross-talk (NEXT)

Why is SMF more efficient over long distances than MMF?

Signals traveling over multi mode fiber experience greater attenuation than those traversing single mode.

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.

Simplex, simplex and half-duplex

Which kind of multiplexing assigns slots to nodes according to priority and need?

Statistical multiplexing

How is latency measured and in what unit?

The delay from when the data leave the source and when it arrives, the unit is called RTT (round trip time)

What does a modem do?

The modem connects to your ISP, which typically provides either cable or DSL Internet service

What is twist ratio and why is it important?

The number of twist per meter is know as twist ratio. The more twist per meter, the more it is resistant to cross talk.

Which type of transmission is measured by baud rate?

Analog

What is the difference between short circuits and open circuits?

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.

What are the four fundamental properties of an analog signal?

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

What kind of cable uses BNC connectors? F-connectors? Which connector is likely to be used by cable TV?

Coaxial cable, coaxial cable, and F- connector

What characteristic of optical transmissions is primarily responsible for the distance limitations of fiber-optic cabling?

Cost and Optical loss

What device can boost an analog signal? A digital signal?

amplifier and repeater

What is the earliest-pair cabling standard that meets the minimum requirements for 10Gbase-T transmissions?

cat 6a

Which of the following is not an example of a broadband transmission?

ethernet

Which part of a toner and probe kit emits a tone when it detects electrical activity on wire pair?

probe

Why do APC ferrules create less back reflection than do UPC ferrules?

the end faces are placed at an angle to each other.