Module 33303-11 Exam

The IP portion of TCP/IP provides,

Data segmentation

The type of system that is not affected by EMI is?

Fiber optic

An access control method that depends on a random time interval delay to recover from a data collision is known as the?

stochastic method

which of the following correctly describes a power line carrier system function?

Data signals are imposed on the AC power wiring

to achieve optimum operation of a transmitter system, the voltage standing wave ratio (VSWR) measured on the transmission line connected between the transmitter and antenna should be?

as low as possible (ie; 1:1)

which of these correctly states the relationship between frequency, wavelength, and antenna size?

as the frequency increases, the antenna becomes smaller

When analog voice signals are converted to digital signals, the sampling rate must be _____.

at least twice the highest frequency component

A device used to link networks that use different protocols is a

bridge

a secondary bus is connected to a primary bus by a communication module that is sometimes called a

bridge

In the OSI model, the layer that forms information into strings or blocks and puts each piece of information in the right place is the?

data link layer

A form of modulation in which a carrier frequency is modulated with tones that represent binary codes (1s, and 0's) is called?

frequency shift keying (FSK) modulation

The plane in space where the centrifugal force pushing a object out into space is equal to the gravitational force pulling an object toward earth is called a?

geostationary orbit

The device that generates the IR signal used to control components of a home audio/video system is contained in the

hand held remote control

the disadvantage of a ring network is?

if a node fails, the network is at least partially disabled

In an analog addressable system, the determination of the alarm state is performed by the

initiation device

in a super heterodyne receiver, the local oscillator (LO) signal is typically

lower than the carrier frequency

The joining of two or more computers with a communication link forms a?

network

a dish shaped antenna, such as those used in satellite TV systems, is called?

parabolic antenna

The device that enables the wireless detection of infrared signals is an?

phototransistor

In the OSI model, cables and connectors are considered part of the?

physical layer

A multipoint-to-point satellite uplink/downlink configuration is used primarily for?

point-of-sale terminals

a token-passing access scheme handles emergency conditions through the use of?

priority settings

the type of interference that comes from devices that radiate energy is known as

radio frequency interference

A receiving device has a set of memory locations called

registers

A device in an RF system that receives and regenerates a signal is called a?

repeater

to prevent the potential bottlenecks of the star topology, some networks arrange there nodes in a?

ring topology

the device used to link multiple data paths through a series of interconnected networks is the?

router

which of these network devices often includes a firewall?

router

the type of network technology that requires a hub is the

star network

In a distributed control system, access to the medium is controlled at each

station or node

An RS-232 cable can be used for distances up to

50 feet

the maximum data transfer rate available with USB 2.0 is

480Mbps

. Infrared (IR) systems operate at a band of frequencies _____.

Above RF and below visible light

The unit used for an RF frequency occurring at billions of cycles per second is?

GHz

Of the frequency bands listed, which one covers the lowest band of frequencies?

L band

Each node device on a wireless LAN requires the use of a

NIC

The data bus serves as a?

Parallel data path

The device used to measure FM, AM, and single -Sideband signals in an application such as mobile communications system is a?

RF field strength analyzer

To facilitate parallel communication, data is divided into multiple?

Streams

Which of the following is a correct statement about a satellite TV antenna?

The antenna must have a line of site to the satellite

Controllers in a network can share information because

They use a common language

To send and receive IR data transmissions in a wireless LAN between computers or other devices, what devices are required per interface?

Two RS-232 interface boards

Which of the following is a correct statement about power line carrier systems

a computer can be used to program and monitor PLC systems

a system that permits discrete identification of alarm signals at the detector level is known as the?

addressable system

The layer of the OSI model that directly interacts with users software programs is the

application layer