Business data communications 5e by stallings chapter 01

Chapter 1: Introduction Business Data Communications, 5e 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 Trends Driving Data Communication • Traffic growth – Voice & data; local and long distance • Development of new services – In turn drives increased traffic • Advances in technology – Encourage and support increased growth and development Key Technology Trends • Faster and cheaper computing and communications • Increasingly “intelligent” networks • Growing importance of Internet, intranet and extranet applications • Increasing use of and dependence on mobile technology Business Drivers Convergence • • • • Applications Services Management Infrastructure Business Information Requirements • • • • Voice communications Data communications Image communications Video communications The Internet & Distributed Applications • Key infrastructure for supporting distributed applications • Internet, including intranets and extranets • TCP/IP protocol suite • Distributed applications • Client-Server Architectures and Intranets Network Types • Wide Area Networks – – – – Circuit Switched Packet Switched Frame Relay ATM • Local Area Networks (LANs) • Wireless Networks • Metropolitan Area Networks Transmission of Information • Transmission and transmission media – e.g twisted pair, fiber, wireless, coax • Communication Techniques – encoding, interface, protocols • Transmission efficiency – multiplexing, compression Management Issues • Network Security • Network Management Communications Standards • Importance • Process • Organizations Resources • Web Sites • Usenet Newsgroups • Journals – Business-oriented – Technical Telecommunication • Uses electricity to transmit messages • Speed of electricity dramatically extends reach – Sound waves: ~670 mph – Electricity: ~186,000 (speed of light) • Bandwidth= information-carrying capacity of a channel ... Applications Services Management Infrastructure Business Information Requirements • • • • Voice communications Data communications Image communications Video communications The Internet & Distributed... computing and communications • Increasingly “intelligent” networks • Growing importance of Internet, intranet and extranet applications • Increasing use of and dependence on mobile technology Business. .. management – help companies break down barriers between divisions Trends Driving Data Communication • Traffic growth – Voice & data; local and long distance • Development of new services – In turn drives