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109 terms

CIS 120 Ch. 5

Telecommunications
STUDY
PLAY
Telecommunications networks play a vital role in our daily activities.
True
___________ refers to the electronic transmission and reception of signals for voice and data communications.
Telecommunication
From small home networks to large private global networks, telecommunications technologies give us ______ to public and private information, communication, and services wherever we may be, whenever we need them.
access
Telecommunications technologies have brought us the Internet and two ways of accessing it.
False
In telecommunications, ____ refers to the hardware, software, and protocols that support telecommunications.
infrastructure
The language of telecommunications is governed by switches.
False
____ requires a sender, a receiver, a signal that contains information, and a medium over which the signal travels. Both the sending and receiving device need to speak the same language.
Telecommunications
Telecommunications requires specialized hardware, software, and protocols.
True
Telecommunications devices such as routers, network adapters, Wi-Fi access points, cellular towers, and satellites, send and receive the signals employing software that governs their operations.
True
The speed at which an electronic communications signal can change from high to low is called the signal ____.
frequency
Signal frequency is measured in hertz (Hz), or cycles per ____.
second
An analog signal fluctuates continuously.
True
Telecommunications signals are only analog.
False
The signals used to send information over voice and data networks can vary in speed and strength.
True
Twisted pair cable consists of individual strands of twisted wire covered with an insulating layer used for telephone and computer networks.
False
Different physical cables offer a bandwidth range from narrowband to wideband.
False
All of the following, EXCEPT ____, are types of transmission cables that are typically used to connect data communications devices.
optical cable
Fiber-optic cable consists of thousands of extremely thin strands of glass or plastic bound together in a sheathing, and transmits signals with light beams.
True
Telecommunications ____ include anything that carries a signal and creates an interface between a sending device and a receiving device.
media
Waves sent at the high end of the radio spectrum, between 1 and 300 GHz, are called microwaves.
True
Global Positioning Systems, ham radios, CB radios, police and emergency communications, satellite communications, and wireless clock systems all make use of radio waves.
True
Radio spectrum, part of the electromagnetic spectrum, refers to all of the frequencies available for radio waves from about 10 KHz to ____ GHz and their assigned uses.
300
Microwave signals are used for high-speed, high-capacity communication links and ____ communications.
satellite
The FDA assigns different frequencies for different uses in the United States.
False
Gateway determines the best path for passing a data packet between networks to its destination.
False
A network interface card is a circuit board or PC card that, when installed, provides a port for the device to connect to a wired network with traditional network cables
True
Communications satellites are relay stations that receive signals from one earth station and rebroadcast them to another.
True
Telecommunications devices include the wide variety of computer _______ designed to support telecommunications activities for individuals and businesses.
hardware
A network operating system performs the same types of functions for the network as operating system software performs for a computer.
True
Telecommunications software is software based on telecommunications _______ used to control, monitor, and troubleshoot data traveling over a telecommunications network.
protocols
Routers, switches, firewalls, modems, and other network control devices include software interfaces that allow you to change device settings.
True
Network management software also complicates the process of updating files and programs on network computers.
False
A ____ is an agreed-upon way of doing something within an industry.
standard
Digital cell phone service (without Internet) is considered to be the ____ generation of cell phones.
2nd
Each cell tower has a transmission and receiving range of 3 to ____ miles depending on geography and environment.
15
Cell phone technologies have progressed through three generations and are entering 5G.
False
A cellular network is a radio network in which a geographic area is divided into cells with a transceiver antenna and station at the far edges of each cell, to support wireless mobile communications.
False
The last analog cell phone networks were closed in 2005.
False
AT&T, T-Mobile, and most international carriers use CDMA.
False
A cellular carrier is a company that builds and maintains a cellular network and provides cell phone service to the public.
True
Many GSM phones have a subscriber ____ module (SIM) card that stores subscriber information.
identity
The cell phone carrier that is NOT one of the top four carriers in the U.S. is ____.
Virgin Mobile
A cellular ____ defines the terms of service provided by a cellular carrier to which a cellular user subscribes.
plan
A pay-as-you-go cell phone plan is a prepay system in which you buy minutes up front that must be used in a given time frame.
True
If two plans from different carriers seem roughly comparable in terms of features, you should view the coverage map of both carriers and examine their handsets and services.
True
Most users choose a prepay system rather than sign a two-year contract.
False
Fees incurred when you use your phone outside of your carrier's coverage area are called _______.
roaming
Current ____ cellular technology is bringing wireless broadband data services to mobile phones.
4G
The cell phone "Internet Communications" service option allows user to connect using a walkie-talkie-style interface.
False
The most popular add-on service is text ringtones.
True
Cellular ____ include specific features of a cell phone plan other than voice communication.
services
Cellular ____ refers to the phone used by the subscriber to communicate on the cellular network.
handset
A cellular handset designed primarily for voice communication is referred to as a cell ____.
phone
A cell phone that is the Flip style has a keyboard and display that share one panel.
False
A cell phone that is the Brick style is a solid thin rectangular block with no hinges; the keyboard and display are left exposed.
False
A cellular handset may be designed to support voice communications and data communications over the Internet, in which case it is referred to as a smart phone.
True
Pagers provide emergency professionals with an easy and reliable method of being summoned.
True
National and regional paging systems set up transmission towers, much like cell phone networks, to cover large geographic areas.
True
On-site paging systems use small desktop transmitters to send pages over a small wireless network that covers a range of up to only 1 mile.
False
A(n) ____ is a small, lightweight device that receives signals from transmitters for the purpose of communications and messaging.
pager
Wireless technologies are transforming our lives by making communications and access to information effortless from anywhere, but only at specific times.
False
"Wireless data communications" refers to telecommunications that take place over the air for data and Internet access.
True
______ and Long Term Evolution are competing to become the standard for global wireless Internet access.
WiMax
The Wi-Fi standards are also known as the 902.11 family of standards.
False
Wi-Fi is wireless networking technology that uses access points to wirelessly connect users to networks within a range of 1-25 miles.
False
Areas around access points where users can connect to the Internet are sometimes called ____.
hotspots
Most new notebook computers include Wi-Fi capability; however, many new desktop computers do not.
True
Wi-Fi technology uses wireless ________ that send and receive data using radio frequencies to and from computers and other digital devices equipped with Wi-Fi cards or adapters.
access points
Cell phone technologies cover cities and large areas, but only support bandwidth of up to roughly 2 Mbps.
True
A WiMAX access point has a ____-mile range.
31
Wi-Fi satisfies the need in small areas, but it requires thousands if not millions of access points to cover a city
False
WiMAX, also known as ____ 802.16, is a fourth-generation wireless broadband technology that evolved from Wi-Fi to provide faster Internet access at a longer range.
IEEE
Long Term Evolution is a ____ wireless broadband technology that was developed to allow GSM cellular technology to evolve to provide very high-speed Internet access.
fourth-generation
LTE's competition is WiMAX, which is being rolled out by Sprint, Comcast, and others in a service called ____.
CLEAR
LTE is an extension of CDMA, so only CDMA carriers will be able to use it.
False
Verizon recently announced that it will be pursuing LTE, indicating that its network will be gradually moved from GSM to CDMA.
False
Competing with LTE is WiMAX, a similar technology used by cellular carriers such as Sprint.
True
Manufacturers are installing ______ chips in a wide variety of communications and computer appliances to allow device-to-device connections.
Wifi
The Bluetooth specification was developed by IBM.
False
Bluetooth communicates at speeds of up to 1 Mbps within a range of up to10 meters.
True
Bluetooth-enabled devices communicate directly with each other in pairs; up to ____ devices can be paired simultaneously.
seven
Bluetooth is useful for passing data wirelessly over a long distance.
False
_______ may take the form of handheld devices, or devices mounted in the doorways of loading docks or in conveyor belt systems.
Readers
Near field communications is defined as wireless telecommunications that take place at a distance of about 8 inches or less.
True
RFID tags consist of a transponder as small as a grain of sand, with an antenna embedded on a ____.
paper tag
RFID technology is embedded in products for identification and tracking purposes.
True
Geotagging is the process of adding geographic identification metadata to digital media and messages.
True
GPS satellites orbit the earth in such a way that at any given time and location on earth, at least ____ satellites are visible to a GPS receiver.
four
A GPS, or global positioning system, uses ____ to pinpoint the location of objects on earth.
satellites
GPSs were originally developed for national security and later extended for public use.
True
Networks connect computing resources utilizing devices that distribute data packets and protect the network.
True
Local resources are the files, drives, and printers that are connected directly to the workstation and are accessible on or off the network.
True
Devices attached to a network are called ports.
False
A computing system may be_______ over components in one small business building, or around the world on a network operated by a global corporation.
distributed
A computer ____ is a collection of computing devices connected together to share resources such as files, software, processors, storage, printers, and Internet connections.
network
A PAN is typically implemented with Bluetooth.
True
A PAN typically covers a range of around 33 ____.
feet
A PAN is typically implemented with satellites.
False
A PAN allows your notebook computer to automatically communicate with your cell phone to connect to the Internet.
True
A ____ area network (PAN) is the interconnection of personal information technology devices, typically wirelessly, within the range of an individual.
personal
A new product from Microsoft called Windows Home Server is designed to back up important data files on network PCs, provide a central location for storing shared documents, and stream media between networked devices.
True
A typical wireless home network uses a wireless access point/router to connect the network to a(n) ______.
ISP
Power-line networking is also called HomePNA.
False
A home network is a ____ area network designed for personal or business use in the home.
local
Most home users take advantage of the convenience and power of Wi-Fi wireless technology for their home network.
True
An intranet uses the protocols of the Internet and the Web, along with Internet services such as Web browsers, within the confines of a private network
True
A virtual private network (VPN) uses a technique called drilling to securely send private network data over the Internet.
False
A _________ is a privately owned computer network that connects computers and devices within the same building or local geographic area.
LAN
LANs that are designed to serve an entire city are called metropolitan area networks, or MANs.
True