Presentation is loading. Please wait.

Presentation is loading. Please wait.

CHAPTER 4 Networks.

Similar presentations

Presentation on theme: "CHAPTER 4 Networks."— Presentation transcript:

1 CHAPTER 4 Networks

2 CHAPTER OUTLINE 4.1 What Is a Computer Network? 4.2 Network Fundamentals 4.3 The Internet and the World Wide Web 4.4 Network Applications

3 LEARNING OBJECTIVES Compare and contrast the two major types of networks Describe the wireline communications media and transmission technologies Describe the most common methods for accessing the Internet Explain the impact that networks have had on business and everyday life for each of the six major categories of network applications

4 4.1 What Is a Computer Network?
Broadband Local Area Networks Wide Area Networks Enterprise Networks

5 4.2 Network Fundamentals Analog and Digital Signals
Communications Media and Channels Transmission Technologies Network Protocols Types of Network Processing

6 Transmission Technologies
Digital subscriber line (DSL) Asynchronous transfer mode (ATM) Synchronous optical network (SONET) T-carrier system

7 Network Protocols Ethernet
Transmission Control Protocol/Internet Protocol (TCP/IP)

8 Types of Network Processing
Client/server computing Peer-to-peer processing

9 Types of Peer-to-Peer Processing
First Type Second Type Third Type

10 4.3 The Internet and the World Wide Web
Accessing the Internet The Future of the Internet The World Wide Web

11 Accessing the Internet
Connecting via an online service Internet kiosks Dial-up DSL Cable Modem Satellite Wireless Fiber to the home

12 Addresses on the Internet
Domain names Top-level domain Name of the organization Name of the specific computer

13 The World Wide Web Home page Uniform resource locator Browser Competition

14 4.4 Network Applications Discovery Communication Collaboration
E-Learning and Distance Learning Virtual Universities Telecommuting

15 Discovery Search engines Metasearch engines
Discovery of material in foreign languages Portals

16 Portals Commercial (public) portals Affinity portals Mobile portals
Corporate portals Industrywide portals

17 Communication Electronic mail (e-mail)
Web-based call centers (customer call center) Electronic chat room Voice Unified

18 Collaboration Work group Virtual group (team) Virtual collaboration
Collaboration software Electronic Teleconferencing E-Learning and Distance Learning

19 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.

20 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.

21 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

22 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

23 Closing Case #1 The Network Neutrality Wars
The Problem The Solution The Results

24 Closing Case #2: Marriott’s Corporate Portal
The Problem The Solution The Results

Download ppt "CHAPTER 4 Networks."

Similar presentations

Ads by Google