succeeding with technology chapter 5
TRANSCRIPT
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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.
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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
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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.
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Radio Wave
A radio waveis anelectromagnetic wave
transmitted through
an antenna atdifferent frequencies.
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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 -
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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.
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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
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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.
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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.
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High-frequency radio signals sent
up to 30 miles through the air.
Microwave Communications
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Microwave Communications
Line-of-sight communications
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Microwave CommunicationsSatellite Transmission
Line-of-sight required
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Networking Software
Networkadministratorsareresponsible for setting
up and maintaining thenetwork.
A network operatingsystemcoordinates thenetwork components to
support
telecommunications.
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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.
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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
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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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Chapter 5 Questions?