Deck 5: Telecommunications, Wireless Technologies, and Computer Networks

Question 1

A network is fundamentally a communication system.

Answer 1

True

Question 2

When you talk to someone, the transmission medium is your voice.

Answer 2

False

Question 3

A faster frequency means a slower data transmission rate.

Answer 3

False

Question 4

The FCC has defined broadband as faster than 200 Kbps. Almost everyone today would consider 200 Kbps to be an extremely fast connection.

Question 5

Coaxial cable is slower than Cat 1 and 2 twisted pair copper cables.

Question 6

Wireless phone conversations, wireless computer networks, global positioning systems, police and emergency communications, satellite communications, and wireless clock systems all make use of radio waves.

Question 7

Microwave signals are used for high-speed, high-capacity communication links and satellite communications.

Question 8

Hubs and switches are seldom combined.

Question 9

Microwave transmission is also called orbital microwave.

Question 10

A microwave link can carry a large percentage of the capacity of a fiber-optic strand.

Question 11

T3 lines carry 72 signals on one line and are used by telecommunications companies.

Question 12

A large organization might employ dozens of network administrators.

Question 13

A network operating system performs the same types of functions for the network as operating system software performs for a computer.

Question 14

A token ring is compatible with Ethernet.

Question 15

Each cell tower has a transmission and receiving range of 3-15 miles depending on geography and environment.

Question 16

Today's cell phone networks are nearly all digital.

Question 17

Areas around access points where users can connect to the Internet are often called warmspots.

Question 18

There are more wide area networks than any other network type.

Question 19

A wide area network (WAN) connects LANs and MANs between cities, across country, and around the world using microwave and satellite transmission or telephone lines.

Question 20

Governments and companies can avoid their own country's laws by processing data within the boundaries of other countries, sometimes called data havens, that have few restrictions on telecommunications or databases.

Question 21

Data communications, a specialized subset of telecommunications, refers to the electronic transmission and reception of digital data, typically between computer systems. _________________________

Question 22

A telecommunications network connects communications and computing devices. _________________________

Question 23

Signal frequency is measured in megabytes, or cycles per second. _________________________

Question 24

Broadband is considered to be any medium with a speed less than 200 Kbps. _________________________

Question 25

Twisted pair and coaxial cables transmit microwave signals over copper or other metal wires. _________________________

Question 26

A(n) radio wave is an electromagnetic wave transmitted through an antenna at different frequencies. _________________________

Question 27

A(n) gateway modulates and demodulates signals from one form to another, typically for the purpose of connecting to the Internet. _________________________

Question 28

A(n) satellite is a network point that acts as an entrance to another network. _________________________

Question 29

A(n) bridge determines the best path for passing a data packet between networks to its destination. _________________________

Question 30

A communications hub is basically a microwave station placed in the Earth's orbit. _________________________

Question 31

Wi-Fi technology uses wireless repeater points that wirelessly send and receive data using radio frequencies to and from computers and other digital devices equipped with Wi-Fi cards or adapters. _________________________

Question 32

In order to provide coverage throughout large geographic areas, many cities are incorporating wireless weave networks that allow wireless routers to pass data over the network without being physically connected through wires. _________________________

Question 33

Long Term Evolution (LTE) is a 4G wireless broadband technology that allows CDMA cellular technology to provide very high-speed Internet access. _________________________

Question 34

Contactless payment systems make use of a(n) RFID chip embedded in a credit card, ID card, and other device to wirelessly send data to a reader. _________________________

Question 35

____ can be defined as the transmission of a signal from a sender to a receiver by way of a medium such as wires or radio waves.

A) Transmissions
B) Communications
C) Submissions
D) Bandwidth

Question 36

-Referring to the accompanying figure, the providers on the left-hand, green side (AT&T, Orange, etc.) are ____ carriers.

A) GSM
B) CDSM
C) GMA
D) CDMA

Question 37

-Referring to the accompanying figure, the providers on the right-hand, beige side (Sprint, Verizon, etc.) are ____ carriers.

A) GSM
B) CDSM
C) GMA
D) CDMA

Question 38

One characteristic of communications is that the message is ____.

A) communicated directly
B) communicated by way of a signal
C) either a. or b.
D) neither a. nor b.

Question 39

An important characteristic of communication is that a communications signal goes through a communications ____ such as wires or radio waves.

A) portal
B) gateway
C) medium
D) router

Question 40

When you read a newspaper, the transmission medium is ____.

A) your eyes
B) the printed page
C) the newspaper stand
D) light waves

Question 41

Establishing a communication link between two digital devices requires that they "speak the same language" using ____.

A) methods
B) protocols
C) functions
D) encryption

Question 42

Computing devices communicate with each other via ____ systems.

A) telecommunications
B) data communications
C) both a. and b.
D) neither a. nor b.

Question 43

Some telecommunications devices with which you interact daily include ____.

A) phones
B) radios
C) televisions
D) all of the above

Question 44

There are three components of telecommunications networks that do NOT include ____.

A) networking bandwidth
B) networking software
C) networking hardware
D) networking media

Question 45

If you were to measure the voltage on a telephone wire during a phone conversation, you would see fluctuations in voltages occur thousands of times per second in varying intensities that mirror the sound waves of your voice. This type of signal is called a(n) ____ signal, and it fluctuates continuously.

A) analog
B) digital
C) hybrid
D) cellular

Question 46

If you measured the voltage on cables used to connect PCs, you would see a discrete voltage state-either high or low. This is called a(n) ____ signal.

A) analog
B) digital
C) hybrid
D) cellular

Question 47

In computer networks, the data transmission rate is also referred to as the bandwidth and is measured in ____ per second.

A) packets
B) bits
C) pixels
D) data

Question 48

Today's bandwidth options fall into one of two categories: ____ or broadband.

A) thinband
B) narrowband
C) wireband
D) bridgeband

Question 49

____ percent of U.S. homes have access to broadband Internet.

A) Fifty
B) Sixty
C) Seventy
D) Eighty

Question 50

Three types of transmission cables are typically used to connect data communications devices that include all of the following EXCEPT ____.

A) twisted pair copper
B) coaxial
C) fiber-optic
D) multicore

Question 51

____ cable, which consists of extremely thin strands of glass or plastic bound together in a sheathing, transmits signals with light beams.

A) Twisted pair copper
B) Coaxial
C) Fiber-optic
D) Multicore

Question 52

Telecommunications signals can travel through air using ____.

A) radio waves
B) light
C) both a. and b.
D) neither a. nor b.

Question 53

To receive the information being transmitted on a specific frequency, all you need is a device with a(n) ____ that allows you to tune in to that frequency.

A) antenna
B) port
C) gateway
D) tuner

Question 54

A DSL modem is similar to a cable modem and provides high-speed Internet service over ____.

A) telephone lines
B) power lines
C) air waves
D) radio waves

Question 55

Computers can connect to networks and the Internet by ____.

A) modem
B) network adapter
C) a combination of modem and network adapter
D) all of the above

Question 56

A network adapter can be a ____, PC card, or an external device that connects through a USB port that provides an external antenna to send and receive network radio signals.

A) circuit card
B) circuit board
C) telephone line
D) power line

Question 57

A ____ is a small electronic box that is used as a central point for connecting a series of computers.

A) hub
B) repeater
C) gateway
D) bridge

Question 58

A ____ makes it possible for several users to send information over a network at the same time without slowing each other down.

A) switch
B) gateway
C) bridge
D) repeater

Question 59

A ____ connects multiple network segments; it listens to each segment and repeats the signal heard on one segment onto every other connected segment.

A) switch
B) hub
C) repeater
D) transistor

Question 60

A ____ connects two or more network segments and helps to regulate traffic.

A) gateway
B) router
C) bridge
D) hub

Question 61

A(n) ____ is a device or software that filters the information coming onto a network; it protects the network computers from hackers, viruses, and other unwanted network traffic.

A) firewall
B) encryption layer
C) gateway
D) router

Question 62

Microwave transmission is a ____ medium, which means that a straight line between the transmitter and receiver must be unobstructed.

A) straight-line
B) line-of-sight
C) parallel-tower
D) clear-line

Question 63

Microwave transmissions can be sent through the air up to distances of approximately ____ miles.

A) 11
B) 21
C) 31
D) 41

Question 64

-Referring to the accompanying figure, this pad where you either wave or tap the card to pay with your credit card is a type of ____ payment system.

A) contact
B) contactless
C) biometric
D) passcard

Question 65

-Referring to the accompanying figure, the credit card can work with a quick tap because of the ____ chip embedded in the card.

A) Internet
B) RFID
C) Bluetooth
D) NFC

Question 66

-Referring to the accompanying figure, this type of quick pass technology can be used in ____.

A) cash registers
B) tollbooths
C) vending machines
D) all of the above

Question 67

A T1 line supports high data transmission rates by carrying ____ signals on one line.

A) 12
B) 24
C) 36
D) 48

Question 68

A multiplexer sends multiple signals or streams of information over a medium at the same time in the form of ____.

A) multiple complex signals
B) multiple simple signals
C) a single complex signal
D) a single simple signal

Question 69

A communications processor, sometimes called a ____ processor, is devoted to managing communications to and from a large computer network.

A) front-end
B) back-end
C) conversation
D) dialog

Question 70

A(n) ____ device is installed at the sending computer to alter outgoing communications according to an encoding scheme that makes the communications unintelligible during transport.

A) encryption
B) decryption
C) biometric
D) filtering

Question 71

A ____ is a person responsible for setting up and maintaining a network, implementing network policies, and assigning user access permissions.

A) network administrator
B) system administrator
C) either a. or b.
D) neither a. nor b.

Question 72

A(n) ____ is an agreed-upon way of doing something within an industry.

A) protocol
B) standard
C) regime
D) edict

Question 73

____ out of every ten people in the world subscribe to a cell phone service-that's 4.1 billion people in all.

A) Five
B) Six
C) Seven
D) Eight

Question 74

A cellular network is a ____ network in which a geographic area is divided into cells with a transceiver antenna (tower) and station at the center of each cell, to support mobile communications.

A) television
B) radio
C) microwave
D) computer

Question 75

____ is the most popular international standard for mobile phones, used by over a billion people across more than 200 countries.

A) GSM
B) CDMA
C) CSM
D) GDMA

Question 76

The ____ networking standard is predominantly used in the United States.

A) GSM
B) CDMA
C) CSM
D) GDMA

Question 77

Most cell phone carriers provide a choice of a "pay-as-you-go" plan without a contract, or a ____ subscription plan with a contract.

A) one-year
B) two-year
C) three-year
D) four-year

Question 78

____ is a cell phone feature that allows you to apply unused minutes from one month to the next.

A) Anytime minutes
B) Credit time
C) Rollover
D) Roaming

Question 79

____ is a cell phone feature where fees are incurred when you use your phone outside your carrier's coverage area.

A) Traveling
B) Roaming
C) Gliding
D) Local hub

Question 80

____ phones are a solid monolith leaving the display and buttons unprotected.

A) Clamshell
B) Bar
C) Slide
D) Swivel