CHAPTER 6
Telecommunications and
Networks
Chapter Outline
6.1 What Is a Computer Network?
6.2 Network Fundamentals
6.3 The Internet and the World Wide Web
6.4 Network Applications
Learning Objectives
1. Compare and contrast the two major types
of networks.
2. Describe the wireline communications media
and transmission technologies.
3. Describe the most common methods for
accessing the Internet.
4. Explain the impacts that networks have had
on business and everyday life for each of the
six major categories of network applications.
Chapter Opening Case
The problem: Internet traffic
Chapter Opening Case (continued)
Possible solution: Network Neutrality
Opponents
Supporters
6.1 What Is a Computer Network?
In a computer network,
connected computers:
Work together
Are interdependent
Exchange data with
each other
Broadband
Fiber optics
DSL
Coaxial
cable
Size of Computer Networks
Home computer network
National computer network
Global computer network
Local Area Networks
Wide Area Networks
Enterprise Network
6.2 Network Fundamentals
Analog and Digital Signals
Communications Media and Channels
Transmission Technologies
Network Protocols
Types of Network Processing
Analog and Digital Signals
Communications Media and Channels
Twisted-pair wire
Coaxial cable
Fiber optics
Network Protocols
Ethernet
Transmission Control Protocol/Internet
Protocol (TCP/IP)
The Four Layers of the TCP/IP Protocol
Packet Switching
Types of Network Processing
Client/server computing
Peer-to-peer processing
Types of Peer-to-Peer Processing
First type
Second type
Third type
6.3 The Internet and the World Wide Web
Accessing the Internet
The Future of the Internet
The World Wide Web
Image of the Internet in
the United States
An Intranet
Accessing the Internet
Connecting via an online service
Internet kiosks
Dial-up
Accessing the Internet (continued)
DSL
Cable Modem
Satellite
Accessing the Internet (continued)
Wireless
Fiber to the home
Addresses on the Internet
IPv4
32 bits
128 bits
Addresses on the Internet
Domain names
Top-level domain
Name of the organization
Name of the specific computer
Internet Address example
www.business.auburn.edu
Name of the specific
computer: business
Name of the
organization:
Auburn University
Top level domain:
edu
The Future of the Internet
The World Wide Web
The World Wide Web
Not the same thing as the Internet
Home page
Uniform resource locator
Leading Browsers
Firefox
Internet Explorer
Safari
Chrome
Opera
6.4 Network Applications
Discovery
Communication
Collaboration
E-Learning and Distance Learning
Virtual Universities
Telecommuting
Discovery
Search engines
Metasearch engines
Discovery of material in foreign languages
Portals
Four Large Search Engines
Metasearch Engines
Publication of Material in Foreign Languages
Portals
Commercial (public) portals
Affinity portals
Mobile portals
Corporate portals
Industrywide portals
Commercial Portal (example)
Affinity Portal (example)
A Corporate Portal Framework
Corporate Portal (example)
Industrywide Portal (example)
Communication
Electronic mail (e-mail)
Web-based call centers (customer call
center)
Electronic chat room
Voice
Unified
Electronic Mail
Call Centers
Call Center in the United States
Call Center in India
Electronic Chat Room
Voice Communication
Two examples of Internet telephony (VoIP)
Skype
Vonage
Unified Communications
Collaboration
Work group
Virtual group (team)
Collaboration (continued)
Virtual collaboration
Collaboration software
Electronic Teleconferencing
E-Learning and Distance Learning
Crowdsourcing
Workflow and Groupware Technologies
Software products supporting collaboration
Microsoft Sharepoint
IBM Lotus Quickr
Telepresence Systems
Leading Telepresence Vendors
See video on Cisco Magic
E-Learning and Distance Learning
E-Learning
Distance learning
Benefits of E-Learning
 Self-paced learning increases content
retention.
 Online materials deliver high-quality, current
content.
 Students have the flexibility of learning from
any place at any time at their own pace.
 Learning time generally is shorter, and more
people can be trained due to faster training
time.
 Training costs can be reduced.
Drawbacks of E-Learning
 Instructors may need training to be able to
teach electronically.
 The purchase of additional multimedia
equipment may be necessary.
 Students must be computer literate and may
miss the face-to-face interaction with
instructors.
 There are issues with assessing students’
work, as instructors really do not know who
completed assignments.
Virtual Universities (example)
Massive Online Open Courses
Telecommuting
Telecommuting Benefits
 For Employees


Reduced stress, improved family life
Employment opportunities for single parents
and persons with disabilities
 For Employers


Increased productivity
Ability to retain skilled employees
Telecommuting Disadvantages
 For Employees



Feelings of isolation
No workplace visibility
Potential for slower promotions
 For Employers



Difficulties in supervising work
Potential information security problems
Additional training costs
Chapter Closing Case
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