Data Communications and Computer Networks: A Business User's by Curt White

By Curt White

Information communications and laptop networks are very important in today's company global. no matter if your profession involves company administration, laptop programming, method layout, or a comparable quarter, DATABASE COMMUNICATIONS AND laptop NETWORKS, seventh version provides you with the thorough realizing you wish of simple positive aspects, operations, and obstacles of other varieties of machine networks. The 7th variation keeps a few of the components that made prior versions so well known, together with clarity, insurance of the most up-tp-date applied sciences, and a balanced presentation of either technical and sensible daily facets of information communications. This ebook bargains complete assurance of instant applied sciences, convergence, compression recommendations, community safety, LAN applied sciences, VoIP, and blunder detection and correction.

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Extra resources for Data Communications and Computer Networks: A Business User's Approach (7th Edition)

Example text

TCP is not the only possible protocol found at the TCP/IP transport layer. User Datagram Protocol (UDP) is an alternative also used, though less frequently, in the TCP/IP protocol suite. The two layers described so far are called end-to-end layers. They are responsible for the data transmitted between the endpoints of a network connection. In other words, these layers perform their operations only at the beginning point and ending point of the network connection. The remaining three layers of the TCP/IP protocol suite—the network, network access, and physical layers—are not end-to-end layers.

The physical layer handles the transmission of bits over a communications channel. A logical connection is a flow of ideas that occurs, without a direct physical connection, between the sender and receiver at a particular layer. 26 Chapter 1 K E Y TE R M S American National Standards Institute (ANSI) Institute of Electrical and Electronics Engineers (IEEE) client/server system International Organization for Standardization (ISO) cloud compression Open Systems Interconnection (OSI) model Simple Network Management Protocol (SNMP) application layer subnetwork presentation layer session layer switch synchronization point transport layer network layer TCP/IP protocol suite application layer convergence data communications International Telecommunication Union-Telecommunication Standardization Sector (ITU-T) data network Internet Protocol (IP) Electronic Industries Alliance (EIA) local area network (LAN) logical connection personal area network (PAN) physical connection physical layer Telnet encapsulation File Transfer Protocol (FTP) metropolitan area network (MAN) protocol router multiplexing token management voice network server frame Hypertext Transfer Protocol (HTTP) network architecture network management Simple Mail Transfer Protocol (SMTP) wide area network (WAN) wireless computer network computer terminal node data link layer physical layer transport layer network layer network access layer workstation REVIEW QUESTIONS 1.

13. How does convergence apply to the communications industry? EXERCISES 1. Create a list of all the actions you perform in an average day that use data communications and computer networks. 2. If you could design your own home, what kinds of labor-saving computer network or data communications devices would you incorporate? 3. Two companies are considering pooling their resources to form a joint venture. The CEO of the first company meets with his legal team, and the legal team consults a number of middle managers in the proposed product area.

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