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Systems Analysis And Design - 961 words
1. A procedure is a specific task that needs to be done to produce output. A system is a group of related procedures for a particular business function. 2. Data is another word used for input, and information is another word used for output. 3. The components of an information systems (IS) are hardware, software, data, procedures, and people. Hardware: physical layer of information system. Software: system and application software. Data: Vital component of every system Procedures: define tasks that must be performed by people who work with the system People: primary purpose of IS is to provide valuable info to managers and users. 4. All information either is produced directly or derived from ...
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Xdsl Technology - 1,834 words
The accelerated growth of content rich applications and online gaming, which demand high bandwidth, has changed the nature of information networks. High-speed communication is now an ordinary requirement throughout business, government, academic, and home office environments. Internet access, telecommuting, and remote LAN access are three of the clearly defined services that network access providers are offering now. These rapidly growing applications are placing a new level of demand on the telephone infrastructure. In particular, the local loop portion of the network (i.e., the local connection from the subscriber to the local central office) has become a challenge for telephone companies. ...
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Xdsl Technology - 1,865 words
... ndwidths that can be greater than 1MHz, much greater than the 3000Hz or so allocated for voice transmission. There are several types of xDSL signal in commercial use today. Each signal type is implemented in circuitry with accompanying software, called a transceiver. The transceiver design includes the encoding or modulation scheme along with decoding or demodulation applied to convert serial binary data streams into a form suitable for transmission through twisted wire pairs. The transceivers may also employ various signal processing, equalization, amplification, and shaping techniques to adapt transmission for physical attenuation and phase distortions experienced by signals transmitte ...
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San Implementation - 1,233 words
A Storage Area Network is virtualized storage. A storage area network (SAN) is a dedicated, centrally managed, secure information infrastructure, which enables any-to-any interconnection of servers and storage systems. A SAN can be configured to provide a nearly infinite pool of storage that you can grow and move between servers as they need it. The storage can be added to and removed without requiring the server to be rebooted. The services provided by the server continue to operate without interruption. The primary purpose for implementing a SAN is to provide a large storage pool that multiple hosts could access. Common storage configurations involve direct attachment of storage to a host. ...
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Modern Communications - 485 words
In conclusion I would like to note that as capacity and data rate capabilities of wireless networks continue to be challenged, a number of enabling technologies have emerged, which provide performance enhancements. The cdma2000 standard is a wide-band, spread spectrum radio interface that uses CDMA technology to provide one available solution for the third generation of wireless communication systems. The cdma2000 provides a true multimedia system that offers improved capacity for both voice and data applications and accessibility to Intranet and Internet applications at high data rates. It meets or exceeds all the IMT-2000 requirements, and provides a smooth migration path from second to th ...
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Cdma - 577 words
Prior to actually speaking about the properties of the CDMA2000 I would like to note that Cdma2000 is a third generation radio transmission technology that evolved from the cdmaOne-based system. The cdma2000 provides a true multimedia system that offers the users improved capacity for both voice and data applications and accessibility to intranet and internet applications at high data rates. It should also be noted that cdma2000 is certainly a revolutionary technology that is expected to benefit the wireless internet and cell phone technology in the near future. 3G (third generation) is the term used to describe next generation mobile services which provide better quality voice and high-spee ...
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Ethernet - 1,216 words
During last three decades Ethernet has become the most widely deployed internetworking topology in the world. Ethernet, which is the common name for IEEE 802.3 CSMA/CD-carrier sense multiple access, collision detection technology, is the dominant cabling and low-level data delivery standard used in local area networks (LANs). Ethernet technology, developed by Robert Metcalfe and outlined in his 1974 Ph.D. thesis at Harvard University; later it was implemented and further developed as an open standard by DEC, Intel, and Xerox (or DIX)(Loomis 45). The Institute of Electrical and Electronics Engineers (IEEE) described these specifications as formal standard. The term Ethernet was coined by Metc ...
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