Download Chapter 4B

Chapter 4B
Mobile Gear
© 2013 by the McGraw-Hill Companies, Inc. All rights reserved.
2
Learning Objectives
4.4
Explain the basic configuration of a notebook
computer
4.5 Contrast tablets and smart phones, and
explain the primary advantages of each
type
of computer
4.6 Describe the way that a wi-fi device connects
to the Internet
4.7 Explain how shared storage and cloud
services can help minimize the amount of data
you need to carry with you in your computer
© 2013 by the McGraw-Hill Companies, Inc. All rights reserved.
3
Mobile Devices
• Portable computers: selfcontained units with keyboard,
monitor and system combined
• Convergence: process where
devices or applications with
different initial purposes
become more alike
• Mobile devices include:
– Notebooks (laptops)
– Netbooks
© 2013 by the McGraw-Hill Companies, Inc. All rights reserved.
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Notebooks
• Attempt to provide all the programs and functions of
a desktop environment
• Advantages over desktops:
– Portability
– Battery doubles as an uninterruptible power supply
• Network connection ports
– Wired
– Modem
– Wireless
• HDMI port : sends a signal to digital television
© 2013 by the McGraw-Hill Companies, Inc. All rights reserved.
5
Notebook Power Management
• Generally designed to run from one battery
• Notebook batteries
– Size/capacity measured in cells, the sections of the battery
that hold power to be distributed
– Batteries with more cells last longer
• Hot swapping: Removing a battery and replacing it
with another one while the computer is running and
plugged into the wall
© 2013 by the McGraw-Hill Companies, Inc. All rights reserved.
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Notebook Power Management
• Battery life determinants:
–
–
–
–
Number of cells
Hardware configuration
Power management settings
What the computer is doing
• Managing power settings
– Power plan: Lists various settings for the
computer to use on battery or wall power
© 2013 by the McGraw-Hill Companies, Inc. All rights reserved.
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Netbooks
• Nearly notebooks:
– Screen size: 9 to 10 inches, versus
13 to 22 for a notebook screen
– CPU typically less powerful
– Memory and hard drive capacity
tend to be less than in notebooks
– Usually lack DVD drive and have
fewer input/output ports
• Operating system
– Windows 7 Starter: a reduced-feature version of Windows
7 that lacks many personalization features
© 2013 by the McGraw-Hill Companies, Inc. All rights reserved.
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Netbooks
• Advantages:
–
–
–
–
–
Price about half the price of a basic notebook
Consume less power
Sufficient OS and hardware
Practical for computing where work space is limited
Full functionality of wireless connectivity
• Google Chromebook
– Relies heavily on cloud services
– Programs and data files reside on Google’s cloud servers
© 2013 by the McGraw-Hill Companies, Inc. All rights reserved.
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Handheld Devices
• Tablet computers
• Smart phones
© 2013 by the McGraw-Hill Companies, Inc. All rights reserved.
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Tablet Computers
• Input
– Touch-sensitive screen
– Virtual keyboard
– Convertible tablets:
Tablet computers that
contain a keyboard attached
by a special hinge
• Processor, drives, monitor similar to notebooks
• Competing versions include:
– Apple's iPad
– Motorola's Xoom
© 2013 by the McGraw-Hill Companies, Inc. All rights reserved.
11
Smart Phones
• Predecessors:
– PDAs (PDA technology later
merged with cell phones)
– Psion Organiser: Released in
1984 and marketed as “the world’s
first practical pocket computer”
– Apple Newton MessagePad:
Released in 1993
• Common smart phone models:
– BlackBerry
– iPhone
© 2013 by the McGraw-Hill Companies, Inc. All rights reserved.
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Smart Phones
• Modern hardware:
– Dual-core processors
– Active-matrix organic LED screens for reduced power
usage
– Motion and proximity sensor
– Bluetooth: short-distance communication between devices
• Operating systems
–
–
–
–
Android
Symbian
Apple iOS
Windows
© 2013 by the McGraw-Hill Companies, Inc. All rights reserved.
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Choosing a Device
• Features of mobile products overlap somewhat:
– Calendar and appointment systems
– Phone calls on smart phones and on notebook computers
via Voice over Internet Protocol (VoIP) programs
• Choose a type of device based on how you will use it:
– Light-duty mobile computing tasks suitable for a handheld
– Services requiring features of a notebook
© 2013 by the McGraw-Hill Companies, Inc. All rights reserved.
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Network Providers
• Make network access available free or for a fee
• Cellular service providers:
– Impose restrictions that make it more difficult to switch to
another company
– Often lock phones
– Most do not provide direct Internet access
• Internet service providers (ISPs)
– WiMAX: Telecommunications protocol
– The hardware for sharing an Internet connection is a router
© 2013 by the McGraw-Hill Companies, Inc. All rights reserved.
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Network Providers
• Router installation
– Router’s IP address : numbers that identify the router on
the network
– SSID : name that identifies the wireless router
– Unsecured connection: anyone within range can simply
connect and gain access
– WEP: An encryption method included in router setup to
support old networks
– WPA2: An encryption method that provides better
protection
© 2013 by the McGraw-Hill Companies, Inc. All rights reserved.
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Storage on the Home Network
• For users with a small set of computers
• Advantages:
– Cuts storage costs, increases access to data, and improves
data security
– Any computer on the network can access the data
– Only one copy of each file is needed
• Drawbacks:
– Cost for the extra hardware
– User must make sure the server is running whenever data
may be needed
© 2013 by the McGraw-Hill Companies, Inc. All rights reserved.
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Cloud-based Storage
• Advantages:
– No hardware required
– Some services provide limited data storage for free
– Costs may be reasonable for the benefits provided
• Risks :
– Theft
– Impossible to be absolutely certain data will be completely
unavailable to intruders
© 2013 by the McGraw-Hill Companies, Inc. All rights reserved.
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Cloud-based Storage
• Example: Carbonite
–
–
–
–
Automatic data backup
Data can be retrieved at the company’s website
Data sharing is simple
Collaboration tools are minimal
• Cloud services that enable greater collaboration:
– Windows Live SkyDrive
– Dropbox
– Google Docs
© 2013 by the McGraw-Hill Companies, Inc. All rights reserved.