Chapter 6

enginestagNetworking and Communications

Oct 26, 2013 (4 years and 15 days ago)

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CHAPTER 6

Networks

What are Computer Networks?

Types of Networks


A
computer network

is a system that
connects computers via communications
media so that data can be transmitted among
them.


Local area networks (LAN)


Wide area network (WAN)


Enterprise network


Local Area Network

Wide Area Network


Analog and Digital Signals

Twisted Pair Wire

Coaxial Cable

Fiber Optics Cable

Network Fundamentals


Network Protocol


Ethernet


Transmission Control Protocol/Internet
Protocol (TCP/IP)


Types of Network Processing


Client/server


Peer
-
to
-
Peer processing

The Four Layers of the TCP/IP
Protocol


Packet Switching

Types Network Applications


Discovery


Communications


Collaboration


Web services

Discovery

Search engines

Metasearch

engines

Discovery of material in foreign
languages

Portals

Commercial Portal
(example)

Affinity Portal
(example)

Corporate Portal
(example)

Industrywide Portal
(example)

Communication


Electronic mail (e
-
mail)


Web
-
based call centers (customer call
center)


Electronic chat room/Instant Messaging


Voice


Unified

Voice Communication


Two examples of Internet telephony (VoIP)




Skype





Vonage

Unified Communications

Collaboration


Virtual collaboration


Workflow technologies


Teleconferencing


Videoconference


Web conferencing


Real
-
time collaboration tools

Software products supporting collaboration

Microsoft Groove

Microsoft Sharepoint

IBM Lotus Quickr


Telepresence Systems

E
-
Learning and Distance Learning


E
-
Learning


Distance learning


Benefits?


Drawbacks?

Telecommuting


Telecommuting

allows workers to work
anytime and anyplace.


Benefits?


Drawbacks?