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Chapter 1: Introduction

Chapter 1: Introduction. William Stallings Business Data Communications 6 th Edition. Information & Communication. Networking is critical to the new corporate structures emerging in today’s businesses Benefits of good networks make geographically dispersed companies more manageable

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Chapter 1: Introduction

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  1. Chapter 1: Introduction William StallingsBusiness Data Communications6th Edition Business Data Communications, Stallings

  2. Information & Communication Networking is critical to the new corporate structures emerging in today’s businesses Benefits of good networks make geographically dispersed companies more manageable help top-heavy companies trim down middle management help companies break down barriers between divisions. make automation and quality enforcement easier to implement. Business Data Communications, Stallings

  3. Basic Communications Model Source: Generates data to be transmitted Transmitter: Converts data into transmittable signals Transmission System: Carries data Receiver: Converts received signal into data Destination: Takes incoming data Business Data Communications, Stallings 3

  4. Basic Communications Model Example Communication between a workstation and a server Business Data Communications, Stallings 4

  5. Trends Driving Data Communication Traffic growth Voice & data over Internet Protocol (IP); local and long distance Development of new services Multimedia on demand and TV distribution Advances in technology Encourage and support increased growth and new developments Business Data Communications, Stallings

  6. Key Technology Trends Faster and cheaper computing platforms, communications hardware, and software Increasingly “intelligent” networks, management and assessment tools Growing importance of Internet, intranet and extranet applications Increasing use of and dependence on mobile and wireless technology Business Data Communications, Stallings

  7. Enterprise Networks Drivers Business Data Communications, Stallings

  8. Enterprise Networks ConvergenceA Three-Layer Model Applications: Seen by end users Voice calling, email, and instant messaging Group collaboration and relationship management Enterprise Services: Seen by network Manager Design, maintenance, and support services Authentication, capacity management, and QoS Infrastructure: Enterpriseavailable assets Links, LANs, WANs, and Internet connections Carry information over data networks Business Data Communications, Stallings

  9. Unified Communication (UC) Convergence Web 2.0: Second generation web capabilities User generated content (blogs, wikis, clips, etc.) Desktop –like user interface friendly capabilities Real-Time Communication (RTC): desktop and mobile software clients functionalities IP Enabling Contact Centers: Enhance customer contact center functionality and performance IP Mobility: Remote access technology and mobile employees support IP Wireless: IP packet extended to support local and wide area wireless communication Business Data Communications, Stallings 9

  10. Business Information Requirements Personal, Workgroup, and Enterprise Unified Integrated Communications: Voice communications Data communications Image communications Video communications Business Data Communications, Stallings

  11. The Internet andDistributed Applications Internet: a key infrastructure for supporting distributed applications TCP/IP: standard open architecture protocol suite universally used in data networks Distributed Applications: used in intercompany and intra-company information exchange Client-Server & Intranets: easy to implement approach to most business applications Business Data Communications, Stallings

  12. Network Types Local Area Networks (LANs) Wide Area Networks (WANs) Circuit Switched Packet Switched Frame Relay ATM Wireless Networks Metropolitan Area Networks (MANs) Business Data Communications, Stallings

  13. Simplified Network Model WAN LAN Business Data Communications, Stallings

  14. Networking Configuration Business Data Communications, Stallings

  15. Transmission of Information Transmission - converts data into transmittable signals Transmission Media - twisted pair, fiber, wireless, and coax Communication Techniques - encoding, interface, protocols Transmission efficiency - multiplexing, compression Business Data Communications, Stallings

  16. Management Issues Network Security Confidentiality Integrity Availability Network Management Highly distributed peer-to-peer networks Complexity of managing and maintaining Reliable operation at all times Skilled personnel and communication costs Business Data Communications, Stallings

  17. Communications Standards Importance Choice of vendors and products Competition leads to lower cost Enovation through open standards Organizations Internet Society (ISOC), International Organization for Standardization (ISO), the IEEE 802 LAN/MAN Committee, the international Telecommunication Union (ITU), and the National Institute of Standards and Technology (NIST), Business Data Communications, Stallings

  18. Resources Book Web Site http://williamstallings.com Usenet Newsgroups IEEE Standards in Education No Jitter ZDNet Journals Business-oriented Technical Business Data Communications, Stallings

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