ppttest 10/6/2015 18:29 1 it ron williams business innovation through information technology...
TRANSCRIPT
PPTTEST 04/21/23 04:36
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IT
Ron Williams
Business Innovation Through Information Technology
Networking
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IT
Ron Williams
OSI Model
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IT
Ron Williams
Perspective on all the Media Discussion
MediaBandwidthTransmission ProtocolsTopologiesLANs, MANs, WANs
How Data is Transmitted
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IT
Ron Williams
Telecommunication Medium
•Twisted pair
•Coaxial cable
•Fiber optic cable
•Satellite
•Microwave
•Cellular
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IT
Ron Williams
Driving the Medium Carries
• What the media carries– Digital & analog signals– The digital bits are combined into bytes– The bytes move in serial or parallel– The speed of the medium is the bandwidth like T1
• Managed by transmission protocols– Ethernet – LAN Standard– ISDN – Integrated services digital network– FDDI – Fiber distributed data interface– ATM- Asynchronous transfer mode– DSL – Digital subscriber line– CSMA/CD – Carrier-sensed multiple-access with collision detection
• Area covered– LANs- Local area network– WANs – Wide area networks– MANs – Metropolitan area networks
• Network Topologies– Ring– Star– Bus
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IT
Ron Williams
Telecommunications & Networking: What’s Important?
•Speed
•Cost
•Reliability
•Reach – To whom
•Range of Function -- What information and business services can be shared
•Security
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IT
Ron Williams
Perspective on all the Media Discussion
Error CheckingTypes of Service
Circuit SwitchedPacket Switch
Addressing and RoutingNetwork Protocols like IP of TCP/IPRouters & Fire Walls
How Data is Routed and Errors Handled
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IT
Ron Williams
Perspective on all the Media Discussion
TCP of TCP/IP, SNA, DEC NetHTTP & FTPFile Transfer, E-mail, Web ApplicationsSecure Sockets
How Data is Represented & Coded
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IT
Ron Williams
Perspective on all the Media Discussion
Reach- Who can I communicate with?How Fast?What is the cost of bandwidth (reach)?Is the Bandwidth reliable? Can I secure my facilities secure?
Range- What applications & data can I share? What is the cost of sharing (range) Is the information reliable?Can I secure my applications and data?
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IT
Ron Williams
MainframeHost
TerminalTerminal
Terminal
Terminal
Terminal
Terminal
Mainframe-centric computingNetworking: Centralized Computing
Networking Protocol
SNA
Other Networking Protocols: DEC Net, TCP/IP, OSI, (Unisys)
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Ron Williams
DBMS
Database
Server
ApplicationProcessing
10MB
Distributed computing
Client
Client
Client
Networking Two–Tier Client/Server
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Ron Williams
ApplicationProcessing
ApplicationProcessing
ApplicationProcessing
DBMS
Database
Server
Distributed computing
Server
Client
Client
Client
Networking: Three-Tier Client/Server
Networking Protocol ExamplesTCP/IPNovell IPXIBM SNAMicrosoft?
Unique Client Application
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Ron Williams
Pros & Cons of Client/Server Computing
Pros
User Interface (PC)
Dept. Control
Data Sharing
Low Cost
Rapid Application Development
Cons
Security
Data Proliferation /Management
Application Proliferation
Systems Management
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Ron Williams
ApplicationProcessing
Browser with or without Java
ApplicationProcessing
DBMS
Database
Server
Distributed computing
Server
Client
World Wide Web
Networking Protocol TCP/IP
Location Service: HTTP
Information Linking & Sharing: HTTP
E-mail: SMTP
File Sharing: FTP
But….Still no Automatic Way to Share Applications and Data Between Systems