Succeeding with Technology Chapter 5

7/30/2019 Succeeding with Technology Chapter 5

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Succeeding with Technology 4th ed> Telecommunications, Wireless & Networks >

Please discontinue useof cell phoneand turn off the ringer.

Fundamentals of Telecommunications Networking Media, Devices, and Software

Wireless Telecommunications Technologies

Networks and Distributed Computing

Telecommunications, WirelessTechnologies, and Computer Networks

Chapter 5


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Key Terms Telecommunications

Networking media

Analog signal

Digital signal

Bandwidth

Broadband

Fundamentals of

Telecommunications


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Telecommunications

Telecommunications: refers to the electronictransmission and reception of signals for

communications.


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Types of Signals

Digital Signal: transmitsdata using two discretestates of voltage: high andlow.

Analog Signal:transmits sound

using continuously

varying levels ofvoltage.


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Signal Frequency Frequency: the speed at

which a signal changes

from high to low.

Bandwidth: the range ofsignal frequencies that canbe sent over a given

medium at the same time.

Often expressed as bits persecond

Broadband: typically 2 5Mbps


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Broadband

Broadbandorhigh-speed Internetrefersto a connection that is

always on or active,such as cable or DSL.

The huge array of digital records maintained by modern hospitals, including

patient records and digital images from X-rays, MRIs, and other medical

procedures, requires broadband networks to transfer records between

locations.


7/44Succeeding with Technology 4th ed> Telecommunications, Wireless & Networks >

Networking Media, Devices,

and Software Key Terms

Twisted pair cable

Coaxial cable

Fiber-optic cable

Radio wave

Modem Network adapter

Microwave transmission

Communications satellite

Ethernet



Networking MediaTwisted Pair

consists of pairs of twisted wires covered with aninsulating layer.

Coaxial cable

consists of an inner conductor wire surrounded byinsulation, a conductive shield (usually a layer of foil ormetal braiding), and a cover.

Fiber Optic

consists of extremely thin strands of glass or plasticbound together in a sheathing (a jacket), transmitssignals with light beams.



Radio Wave

A radio waveis anelectromagnetic wave

transmitted through

an antenna atdifferent frequencies.



Radio Waves

Radio waves use differing frequencies tocarry many types of information:

http://electronics.howstuffworks.com/radio-spectrum1.htm

AM & FM Radio

Short Wave & CB Radio

Television Broadcasts Garage Doors Openers

Baby Monitors

Cordless Phones

Cell Phones

Radio Controlled Carsand Airplanes

Global PositioningSystems

Wireless ComputerNetworks

MicrowaveCommunications

Emergencycommunications

Satellite communications

Wireless clock systems
http://electronics.howstuffworks.com/radio-spectrum1.htmhttp://electronics.howstuffworks.com/radio-spectrum1.htmhttp://electronics.howstuffworks.com/radio-spectrum1.htmhttp://electronics.howstuffworks.com/radio-spectrum1.htm



Networking Devices

Modem: modulates anddemodulates signals from

one form to another.

Network Adapteris acomputer circuit board, PC

card, or USB device installedin a computer so that the

computer can be connected to

a network.



Networking Devices

Network Control Devices:

Hub/Switch

Controls flow of data between

devices on a network Router

Routes packets to destinations

and connects one network to

another

Wireless Access Point

Allows devices to connect

wirelessly to a wired network



Network Control Devices

For multiple computers to communicate, special devices

are required to ensure that information that is sent

reaches its destination quickly and securely.



Microwave Transmission

Microwavetransmission, alsocalled terrestrial

microwave, is a line-of-sight medium,which means that a

straight line between

the transmitter andreceiver must be

unobstructed.



High-frequency radio signals sent

up to 30 miles through the air.

Microwave Communications



Microwave Communications

Line-of-sight communications



Microwave CommunicationsSatellite Transmission

Line-of-sight required



Networking Software

Networkadministratorsareresponsible for setting

up and maintaining thenetwork.

A network operatingsystemcoordinates thenetwork components to

support

telecommunications.



Networking Management Software

With network management software, a manager on a

networked desktop can monitor the use of individual

computers and shared hardware (such as printers), scan

for viruses, and ensure compliance with software

licenses.



Key Terms Cellular network & carrier

Global positioning system

Wireless fidelity (Wi-Fi)

4G Technologies

Bluetooth

Infrared Transmissions

Radio frequency identification

Near-field communications (NFC)

Wireless Telecommunications

Technologies


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Cell Phone Technologies

A cellular networkis a radio network in which ageographic area is divided into cells, with a transmission

tower and station at the center of each cell, to support

mobile communications.


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Cellular Networks and Carriers

A cellular carrieris a company that

builds and

maintains acellular network

and provides cell

phone service to

the public.


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GSM and CDMA

Standards for cell phone

networks are GSM andCDMA.

GSMis the mostpopular global standardfor mobile phones.

The CDMA networkingstandard is

predominantly used in

the United States where

it is in equal competition

with GSM.


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Wireless Technologies Wireless Fidelity(IEEE 802.11s), orWi-Fi, is

wireless networking technology that makes use

of access points to connect devices to

networks.


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Wireless TechnologiesWiMAX and Long Term Evolution (LTE), are

fourth-generation (4G) Internet access over large

areas.

You will be able toreceive high-speed

Internet at home, work, in

the car, on the street, in

restaurants, businesses

and everywhere you travel

overone wireless network.


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WiMAXWiMAX, which stands for

Worldwide Interoperability

for Microwave Access, also

known as IEEE 802.16, is anext-generation wireless

broadband technology that is

both faster and has a longer

range than Wi-Fi. WiMAX isbuilt on Wi-Fi standards and

is able to interoperate with

Wi-Fi networks.


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Wireless Technologies

Bluetoothis wireless technology that enables awide variety of digital devices to communicate

directly.

Once the Lexus pairs with your Bluetooth-enabled cell phone,

you can make calls using the touch screen shown here, controls

on the steering wheel, or voice commands.
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Wireless Technologies

Infrared (IrDA) technology utilizes infrared rays

to send data over a short distance wirelessly.

14 ft range

Narrow-angle cone (30o)

Line-of-sight

4-16 Mbps

www.mzoop.com
http://www.mzoop.com/http://www.mzoop.com/


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Wireless Technologies Radio Frequency ID(RFID)

uses tiny transponders in tags

that can be attached to

merchandise or other objects

and read using an RFID receiveror reader for the purpose of

identification.


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Near Field Communication (NFC)

NFCis a short range wirelesstechnology that is designed for

private communications at short

range, such as making

payments by swiping a cell

phone across a pad.


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Key Terms

Distributed Computing

Cloud Computing

Personal Area Network

Local Area Network

Intranet

Virtual Private Network (VPN)

Metropolitan Area Network (MAN)

Wide Area Network (WAN)

Networks and Distributed

Computing


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Network Concepts

A computing system that may be distributed over

components in one small business building, or

around the world on a network operated by a global

corporation refers to Distributed Computing.


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Cloud Computing

Cloud computingutilizesInternet-based serviceproviders to deliver information and computing

services, including software, business systems, and

data storage, for business and personal use.


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Network Types

Personal Area Network(PAN)

The wireless interconnection

of personal informationtechnology devices within the

range of an individual.

Mostly associated with

Bluetooth technology.

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Network Types

Local Area Network(LAN)

Connects computer systems and devices

within a common geographic area.


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System Administrator

Local Area Network

Star

topology

Bus

topology

Servers

Wirelessaccess point

switch


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Network Types

Intranet

A private network that utilizes

Internet and Web protocols

and software.

Virtual Private Network(VPN)

Uses the Internet to connect

an organizations networks

dispersed around the world

into one large intranet.


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Network Types

A Metropolitan Area Network (MAN)connectsnetworks within a city or metropolitan-size area into a

larger high-speed network.


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router

router

FSU Tallahassee LAN

FSU Panama City LAN

Network Types Wide Area Network

connects LANs between

cities, cross country, and

around the world using

microwave and satellite

transmission ortelephone lines.


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Network Types

A Global Network(International Network) is aWAN that crosses National boundaries.


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Network Types

Connecting corporate computer systems

among organizations is the idea behind

electronic data interchange (EDI).


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Installing Home Wi-Fi

Requirements High-speed Internet

Cable Modem or DSLModem (provided be

ISP) Wireless Access

Point/Router

Wireless adapters foreach device.

Additional AccessPoints as needed.


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