1. PPTTEST 10/6/2015 18:29 1 IT Ron Williams Business Innovation Through Information Technology Networking

2. PPTTEST 10/6/2015 18:29 2 IT Ron Williams OSI Model

3. PPTTEST 10/6/2015 18:29 3 IT Ron Williams Perspective on all the Media Discussion Media Bandwidth Transmission Protocols Topologies LANs, MANs, WANs How Data is Transmitted

4. PPTTEST 10/6/2015 18:29 4 IT Ron Williams Telecommunication Medium Twisted pair Coaxial cable Fiber optic cable Satellite Microwave Cellular

5. PPTTEST 10/6/2015 18:29 5 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

6. PPTTEST 10/6/2015 18:29 6 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

7. PPTTEST 10/6/2015 18:29 7 IT Ron Williams Perspective on all the Media Discussion Error Checking Types of Service Circuit Switched Packet Switch Addressing and Routing Network Protocols like IP of TCP/IP Routers & Fire Walls How Data is Routed and Errors Handled

8. PPTTEST 10/6/2015 18:29 8 IT Ron Williams Perspective on all the Media Discussion TCP of TCP/IP, SNA, DEC Net HTTP & FTP File Transfer, E-mail, Web Applications Secure Sockets How Data is Represented & Coded

9. PPTTEST 10/6/2015 18:29 9 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?

10. PPTTEST 10/6/2015 18:29 10 IT Ron Williams Mainframe Host Terminal Mainframe-centric computing Networking: Centralized Computing Networking Protocol SNA Other Networking Protocols: DEC Net, TCP/IP, OSI, (Unisys)

11. PPTTEST 10/6/2015 18:29 11 IT Ron Williams DBMS Database Server Application Processing 10MB Distributed computing Client Networking Two–Tier Client/Server

12. PPTTEST 10/6/2015 18:29 12 IT Ron Williams Application Processing DBMS Database Server Distributed computing Server Client Networking: Three-Tier Client/Server Networking Protocol Examples TCP/IP Novell IPX IBM SNA Microsoft? Unique Client Application

13. PPTTEST 10/6/2015 18:29 13 IT 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

14. PPTTEST 10/6/2015 18:29 14 IT Ron Williams Application Processing Browser with or without Java Application Processing 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