Data Communications
What Is Data Communications?
Data communication is the transmission of data from one point A to point B (Usually Computer to Computer) over some type medium such as telephone line.
Data is row fact such as number or character.
Data Communications is subsets of Telecommunication, which is concerned with the transmission of audio, video and graphical data from one point to another over some medium.
While many people use the terms data communication and telecommunication interchangeably, they are not the same.
Data communications specifically refers to the transmission of information converted in to a digital format or computer – readable form, over a communication network.
It is much more limited then telecommunication, which is includes information transmitted in an analog format. Building security system, local and long distance telephone services, and facsimile (fax) services, for example are telecommunication system that are not considered data communications system.
Networks
Data Communication or data comm. Sometimes is refers to Networking because it involves the transmission of data over a network, which is a group equipment and transmission line that is used by users located in many locations to transfer information. Data Communication is used networks, such as Telephone system as highways over which to transfer data.
Because Data Communications involves the transmission digital data, one or more computer-related devices will be part of data communication system. These devices can be mainframes computers, personal or network computer, laptop or notebook computers, terminals, printers or any other device that is part of a computer system.
To understand why Data Communication systems are so widespread in today’s world, look at how many computers are now in people’s homes and on their desk at work. The explosion in PC usage has resulted in part form the dramatic drop in price for PC hardware. Home computer can be connected to a network as well, such as when a user dial in to the office network or connected to the internet.
A data communication network consists of the computers and computer-related device that need to communicate with each other, as well as the devices and line that connect the computer together. The office workers each enter their work into a personal computer and then either print out or save the result on disk. To enter data into the server, the information must be rekeyed from the printer output or transfer from the disk. In this instance, not having a network result in duplication of effort, additional time needed to transfer the information and the possibility that error will be introduce into the data.
What ever the configuration, a network should be designed so it is cost-efficient and suited to the company’s needs.Configuration types of networks are various. The oldest type of networks is called a wide area network (WAN) and is composed of one to many host computers or servers connected using a network that spans large distance. Such a network can connect computers in several cities or counties. The history of data communication is built on these networks and many WANs exist in corporations to this day. The newest and most widely known type of network is a Local Area Network (LAN). LANs is used to connected PCs and other type of computers in limited geographical area, such as a within a building or within an office. A Metropolitan Area Network (MAN) is a network that has some of the characteristic of both LANs and WANs and has a size that falls between WANs and LANs. MANs can cover area from size of a group of a few building to end entire city to part of country. Finally, the Internet has networks that connect many type computers and is considered and Internet work. Wireless networks are one of the fastest growing segments of the communication market. Such networks make use of radio waves and satellites to provide communications
Miss, I wanna ask about the "jaringan komputer" task, is it create a blog? Or something else?
BalasHapusJaxcaizaer.blogspot.com
Hen Jackson (0831030)
Sorry for late response , for task Computer Network last week is answer 2 question for me about OSI and example of protocol OSI each of layer and create by your group.
BalasHapusThanks
sorry salah post comment deh jadinya di artikel paling bawah..
BalasHapussuggestion from me: font & colour buat judulnya diubah donk biar jelas...
biar ga pada salah post commentnya..
soalnya warna nya sama smua :(
no hard feeling..
peace..^_^
PERTAMAX lagi dech...^_^
BalasHapusTUGAS JARKOM 1:
Answer the question number 4:
What is the Internet?
The Internet is a global system of interconnected computer networks that use the standardized Internet Protocol Suite (TCP/IP) to serve billions of users worldwide. It is a network of networks that consists of millions of private and public, academic, business, and government networks of local to global scope that are linked by copper wires, fiber-optic cables, wireless connections, and other technologies.
Wee.. gagal pertamax lg dh >.<
BalasHapusJARKOM TASK 1
Question No.3
What is the difference between a LAN, a WAN, and a MAN ??
LAN or Local Area Network is a group of computers that share a common connection and are usually in a small area or even in the same building. For example an office or home network. They are usually connected by Ethernet cables and have high speed connections. If it was a wireless setup it would be called a WLAN, which would have a lower connection speed.
MAN or Mmetropolitan Area Network is a larger network that connects computer users in a particular geographic area or region. For example a large university may have a network so large that it may be classified as a MAN. The MAN network usually exist to provide connectivity to local ISPs, cable tv, or large corporations. It is far larger than a LAN and smaller than a WAN. Also large cities like London and Sydney, Australia have metropolitan area networks.
WAN or Wide Area Network is the largest network and can interconnect networks throughout the worldand is not restricted to a geographical location. The Internet is an example of a worldwide public WAN. Most WANs exist to connect LANs that are not in the same geographical area. This technology is high speed and very expensive to setup.
Jihan_0831037
ref : tips4pc.com
No.1.
BalasHapusHow does Data communication differ from Telecommunication?
Communication is the process of transferring information from a sender to a receiver with the use of a medium in which the communicated information is understood by both sender and receiver. It is a process that allows organisms to exchange information by several methods.
Telecommunications is a general term for a vast array of technologies that send information over distances. Mobile phones, land lines, satellite phones and voice over Internet protocol (VoIP) are all telephony technologies -- just one field of telecommunications. Radio, television and networks are a few more examples of telecommunication.
dedi_0831028
thanks
Question No.4
BalasHapusWhat is the Internet?
The Internet is a global network of computers. Every computer that is connected to the Internet is considered a part of that network. This means even your home computer. It's all a matter of degrees, you connect to your ISP's network, then your ISP connects to a larger network and so on. At the top of the tree is the high-capacity backbones, all of these interconnect at 'Network Access Points' 'NAPs' at important regions around the world. The entire Internet is based on agreements between these backbone providers who set in place all the fiber optics lines and other technical aspects of the Internet.
The Internet, in simplest terms, is the large group of millions of computers around the world that are all connected to one another. These computers are connected by phone lines, fiber optics lines, coaxial cable, satellites, and wireless connections.
When you log on to the Internet you are given access to many of the other computers that are connected around the world.
best regard,
Dedi Candra ( 0831011 )
Komentar ini telah dihapus oleh pengarang.
BalasHapusQuestion no.3
BalasHapusQ:What is the difference between a LAN, a WAN, and a MAN ??
A:
LAN(Local area networks) are computer networks ranging in size from a few computers in a single office to hundreds or even thousands of devices spread across several buildings. They function to link computers together and provide shared access to printers, file servers, and other services. LANs in turn may be plugged into larger networks, such as larger LANs or wide area networks (WANs), connecting many computers within an organization to each other and/or to the Internet.
MAN(metropolitan area network) is a large computer network that usually spans a city or a large campus. A MAN usually interconnects a number of local area networks (LANs) using a high-capacity backbone technology, such as fiber-optical links, and provides up-link services to wide area networks and the InternetA MAN is optimized for a larger geographical area than a LAN, ranging from several blocks of buildings to entire cities. MANs can also depend on communications channels of moderate-to-high data rates. A MAN might be owned and operated by a single organization, but it usually will be used by many individuals and organizations. MANs might also be owned and operated as public utilities. They will often provide means for internetworking of local networks. Metropolitan area networks can span up to 50km, devices used are modem and wire/cable.
WAN (wide area network)in comparison to a MAN, is not restricted to a geographical location, although it might be confined within the bounds of a state or country. A WAN connects several LANs, and may be limited to an enterprise (a corporation or an organization) or accessible to the public. The technology is high speed and relatively expensive. The Internet is an example of a worldwide public WAN.
BesT ReGaaRds,
S u N a R T 0
( 0 8 3 1 0 2 7 )
Why do you need to study the Data communication?
BalasHapusData Communications is the transfer of data or information between a source and a receiver.The actual generation of the information is not part of Data Communications nor is the resulting action of the information at the receiver. Data Communication is interested in the transfer of data, the method of transfer and the preservation of the data during the transfer process.
The purpose of Data Communications is to provide the rules and regulations that allow computers with different disk operating systems, languages, cabling and locations to share resources. The rules and regulations are called protocols and standards in Data Communications.
That's all the information i can share
Best Regards,
Hansky
(0831019)
Why are computer networks needed more now than they were in the past ?
BalasHapusJust my opinion :
I think because in this time,more of networks are used in business so they must have a lot of communication between each other so it will efficient if we use networks communication and the information or data can transfer to each other quickly. . I thinks that all. . .
No comment. . .
Regards,
Aryanto (0831015)
What is Internet?
BalasHapusThe Internet, sometimes called simply "the Net," is a worldwide system of computer networks - a network of networks in which users at any one computer can, if they have permission, get information from any other computer (and sometimes talk directly to users at other computers). Today, the Internet is a public, cooperative, and self-sustaining facility accessible to hundreds of millions of people worldwide. Physically, the Internet uses a portion of the total resources of the currently existing public telecommunication networks.
The most widely used part of the Internet is the World Wide Web (often abbreviated "WWW" or called "the Web"). Its outstanding feature is hypertext, a method of instant cross-referencing. In most Web sites, certain words or phrases appear in text of a different color than the rest; often this text is also underlined. When you select one of these words or phrases, you will be transferred to the site or page that is relevant to this word or phrase. Sometimes there are buttons, images, or portions of images that are "clickable." If you move the pointer over a spot on a Web site and the pointer changes into a hand, this indicates that you can click and be transferred to another site.
Best Regard,
WENDY
0831036
Why Computer Network needed more now than they were in the past??
BalasHapusAnswer :
Because :
1. Save cost, with the Computer Network, user can sharing hardware so they don't need to buy more than one hardware for each user. Example : Printer (which used for printing became a hardcopy filing document), without Computer Network, every users must have one on their Computer, but with Computer Network, they just need to share it and use it if they want.
2. Save Time. We just need a server, a database and an application, every user can enjoy using applicatiion and add/edit/delete/view the data anytime without afraid of disturbing other user that using it.
3. More convinience and Flexible. Beside Computer Network in the Local Area, it also can share more information with the other user (customer/supplier). It can make it more easier and faster to communication with each other.
4. Security. beside Computer Network use as sharing information, it also can set a security to secure some of the important data.
5. it will be alot of thing can be done in the future beside that.
that's why Computer Network become more and more important in this day.
Best Regards,
David
0831010
Why Computer Network More Important Now Than The Past??
BalasHapusI think its because the the business now time is much more advance in technology and much more bigger than the business in the past.
The Computer Network Can Help them share file,easy communication, reduce process time, and alot more.
The CN will increase the effeciency of company significanly therefore enable much more chance to gain greater gain.
Don't Give Us So Many Task PLEASE!!!
BalasHapusWE ARE CRUSHING UNDER THE PRESSURE OF IT!!!
XD
No. 4 : What is the internet?
BalasHapusThe Internet is a computer network that interconnects millions of computing devices throughout the world. Not too long ago, these computing devices were primarily traditional desktop PCs, Linux workstation, and so-called servers that store and transmit information such as Web pages and e-mail messages. Increasingly, however, nontraditional Internet end system such as personal digital assistant (PDAs), TVs, portable computers, cell phones, Web cams, automobiles, environmental sensing devices, picture frames, and home electrical and security system are being connected to the Internet. Indeed, the term computer network is beginning to sound a bit dated, given the many nontraditional devices that are being hooked up to the internet. In Internet jargon, all of these devices are called host or end systems.
Hen jackson (0831030)
Why do you need to study the Data communication?
BalasHapusThe distance over which data moves within a computer may vary from a few thousandths of an inch, as is the case within a single IC chip, to as much as several feet along the backplane of the main circuit board. Over such small distances, digital data may be transmitted as direct, two-level electrical signals over simple copper conductors. Except for the fastest computers, circuit designers are not very concerned about the shape of the conductor or the analog characteristics of signal transmission.
Frequently, however, data must be sent beyond the local circuitry that constitutes a computer. In many cases, the distances involved may be enormous. Unfortunately, as the distance between the source of a message and its destination increases, accurate transmission becomes increasingly difficult. This results from the electrical distortion of signals traveling through long conductors, and from noise added to the signal as it propagates through a transmission medium. Although some precautions must be taken for data exchange within a computer, the biggest problems occur when data is transferred to devices outside the computer's circuitry. In this case, distortion and noise can become so severe that information is lost.
So, Data Communications concerns the transmission of digital messages to devices external to the message source
Yudhi
0831023
In my opinion,
BalasHapusLAN (Local Area Network) is a computer network that only can reach within small place such as in the college, in the company, in home, a building. LAN usually uses Switch or HUB to connect between computers and network in a company, or uses wi-fi (wireless) with this technology usually it called hotspot. LAN able transfer data around 10,100 or 1000 Mbps.
In a company that using LAN, they can communicate with the other users using an application, sharing hardware such as printer. And one of the computers will be as the server to control all the system in a network.
MAN (Metropolitan Area Network) a network that able to reach within a city that can transfer data in a high speed and connect between different place from company, or college. The scope of MAN around 10 to 50 km.
WAN (Wide Area Network) a network that can reach a half (diameter) of a whole world, connect among countries or places. WAN use to connect between one local network to another local network with different place or country.
best regards,
Cheristina Ngingsih
0831034
Answer for question no.1...
BalasHapusHow does Data communication differ from Telecommunication??
*Telecommunication is a broad term that defines any assisted transmission with using a medium and allow people to communicate in several methods from a long distance. The example are: telephone, telegraph, radio, TV, even smoke signals.
*Data communication implies a more narrow subset of telecommunication which applies only to the transmission of information in digital form such as bits and bytes stuff
Best Regards,
JEFRI 0831024
What is Internet?
BalasHapusMy Answer,
Internet is a network of interconnected computers that enables global Internet users exchange information / data through the network. Internet is a data communication system of global scale, an infrastructure consisting of hardware and software that connects computers in the network.
Regarts,
Charles Yuvinus / Harlees
(0831033)
Numpang lwt.....
BalasHapusbuat yudy, cheris n vier..
cpt banget xan postnya..
td gw kira masih ada urutan di bwh hanjack.
mn tw, sekali gw post uda terskip sama xan... ^^
hahaha..
SWT da...
LAN Network
BalasHapusLAN (Local Area Network) is a collection of computers, where there are several computer units (clients) and 1 unit of computer data banks (the server). Each client or between clients and servers can exchange files and a printer, which is connected to the LAN network.
LAN network benefits:
1. Exchange files can be done easily (File Sharing).
2. Use the printer can be done by all clients (Printer Sharing).
3. Data files can be stored on the server, so data can be accessed from all clients according to the authorization of securities of all employees, which can be made based on the company's organizational structure so that data security is guaranteed.
4. File data out / in / to a server can be in control.
5. The process of data backup becomes easier and faster.
6. The risk of loss of data by computer virus becomes very small.
7. Communication between employees can be done by using the E-Mail & Chat.
8. If one client / server connected to the modem, then all or most computers on the LAN can access the network to the Internet or send faxes with 1 modem.
WAN Network
WAN (Wide Area Network) is a collection of LANs and workgroup connected by communication using a modem and Internet networks, from the head office to branches or to the head office or between branch offices. In this network system, the exchange of data between offices can be done quickly and with relatively low cost. This network system can use the Internet network that already exists, to connect between the head office and branch offices or with PC / Notebook that is in another city or country.
WAN Network benefits:
1. Server headquarters can serve as a data bank of the branch office.
2. Communication between the offices can use the E-Mail & Chat.
3. Document / file are usually sent by fax or postal packet, can be sent via e-mail and transfer files from the head office and branches or to the head office with a relatively low cost and within a very fast time.
4. Data Pooling and Updating Data can be made between the offices every day at the appointed time.
MAN Network
MAN (Metropolitan Area Network) is a computer network covering a larger area of the LAN, such as between regions within a province. In this case connects a network of several small networks into the environment a bigger area, for example as follows: departmental networks, where several departments at the district / city are connected to one another.
Regards,
Oktavianus 0831007
number empat aja:
BalasHapuswhat is the imternet???????/
Internet: is a worldwide, publicly accessible series of interconnected computer networks that transmit data by packet switching using the standard Internet Protocol (IP).
IP: Internet Protocol; is a data-oriented protocol used for communicating data across a packet-switched internetwork.
number empat aja:
BalasHapuswhat is the internet????
Internet: is a worldwide, publicly accessible series of interconnected computer networks that transmit data by packet switching using the standard Internet Protocol (IP).
IP: Internet Protocol; is a data-oriented protocol used for communicating data across a packet-switched internetwork.
thank's
regards
iskandar (0831025)
What is the difference between a LAN, a WAN, and a MAN ??
BalasHapusLAN (Local Area Network) is a collection of computers, where there are several computer units (clients) and 1 unit of computer data banks (the server). Between each client and between clients and servers can exchange each other's files and a printer connected to the computer units are connected to the LAN network.
WAN (Wide Area Network) is a collection of LANs and / or workgroup connected by communication using a modem and Internet networks, from / to the head office and branches, and between branch offices. In this network system, the exchange of data between offices can be done quickly and with relatively low cost. This network system can use the Internet network that already exists, to connect between the head office and branch offices or with Stand Alone PC / Notebook that was in another city or country.
A metropolitan area network (MAN) is a large computer network that usually spans a city or a large campus. A MAN usually interconnects a number of local area networks (LANs) using a high-capacity backbone technology, such as fiber-optical links, and provides up-link services to wide area networks and the Internet.
Regards,
Yopie Liawanto ( 0831026 )
To Riko : Thanks comment nya ... nanti warna nya saya ganti dech yaa.
BalasHapusTo : Arianto (0831022) mengatakan...
BalasHapusDon't Give Us So Many Task PLEASE!!!
WE ARE CRUSHING UNDER THE PRESSURE OF IT!!!
XD
Me : Ga banyak koq kan cuma satu soal aja tiap pertemuan di blog, atau kelompok.. tujuan juga supaya kalian baca..baca..dan baca... biar ada nyangkut. enjoy It :)
To All :
BalasHapusTolong Reminder temen nya ya? ada 12 orang lagi yang belum comment
831075 Delwyn Kieweicien
831035 Juniarto
831031 Tommy
831029 Jeri Susanto
831020 Hengky
831021 Jack Daniel
831017 Adrian Hartanto
831018 Mark Harlem
831012 Eka Sanita
831013 Nungky Megawati Silvia
831008 Bornok Walensha
431010 Dorny
thanks all -salam-
Why are computer networks needed more now than they were in the past?
BalasHapusBecause now in the world the bussiness is competitive so we need information to getting easier,more quickly and more saving. With the computer network all we need just one server, hardware, application and can be share with other computer , so we can save a lot of thing especially cost.
Thats way computer network so needed in now and we dont have to find every hardware/appliccation for eash computer
Regard
Jeri susanto
(0831029)
What is the Internet?
BalasHapus(i) is logically linked together by a globally unique address space based on the Internet Protocol (IP) or its subsequent extensions/follow-ons;
(ii) is able to support communications using the Transmission Control Protocol/Internet Protocol (TCP/IP) suite or its subsequent extensions/follow-ons, and/or other IP-compatible protocols; and
(iii) provides, uses or makes accessible, either publicly or privately, high level services layered on the communications and related infrastructure described herein."
Regards
Adrian.H
(0831017)
Sorry... Just Testing because have complain that this blog can't comment
BalasHapusLocal Area Network (LAN)
BalasHapusComputers networked together in a self-contained group form a Local Area Network, or LAN. A LAN typically is contained within a single building or a group of neighbouring buildings. Two computers linked together at home are the simplest form of a LAN. Several hundred computers cabled together across several buildings at school form a more complex LAN. LANs are usually connected with coaxial or CAT5 or CAT6 cable.
Metropolitan Area Network (MAN)
A Metropolitan Area Network is a network that interconnects computers in a geographic area larger than that covered by even a large LAN but smaller than the area covered by a wide area network (WAN). The term is applied to the interconnection of networks in a city into a single larger network, and it also is also used to mean the interconnection of several local area networks by bridging them with backbone lines. Several branches of a chain store within a city might find a MAN useful. MANs are usually connected with fibre-optic cable, microwave transceivers or leased data landlines.
Wide Area Network (WAN)
A WAN is geographically large. It is often formed by the joining together of LANs in distant places. A national banking organization, for example, may use a WAN to connect all of its branches across the country. The difference between LANs and WANs is getting blurry as fibre optic cables have allowed LAN technologies to connect devices many kilometers apart. WANs are usually connected using the Internet, ISDN landlines or satellite.
What is the Internet?
BalasHapusThe Internet" refers to the worldwide network of interconnected computers, all of which use a common protocol known as TCP/IP to communicate with each other. Every publicly accessible website is hosted by a web server computer, which is a part of the Internet.
Jack Daniel
0831021
Computer networks are needed more now than they were in the past because
BalasHapus1. Network enables resource management more efficient. For example, many users can share a single printer with high quality, not to using low-quality printers at each desk. In addition, the network software licenses can be cheaper than stand-alone licenses separately for the same number of users.
2. Network helps maintain reliable information and keep up-to-date. Centralized data storage system that is well managed allows many users to access data from various different locations, and restricts the access to the data which is being processed.
3. Network helps accelerate the process of sharing data (data sharing). Data transfer on the network is always faster than other tool of data sharing is not a network.
4. Network allows a working group to communicate more efficiently. Letters and delivery of electronic messages is the substance of most of the network systems. Scheduling systems, project monitoring, online conference and groupware, all help the team work to be more productively.
5. Network helps businesses in serving their clients more effectively. Long-distance access to centralized data allows employees to serve clients and the client can directly communicate with suppliers.
Best Regards,
0831013
Nungky Megawati Silvia
What is the Internet?
BalasHapusThe Internet, in simplest terms, is the large group of millions of computers around the world that are all connected to one another. These computers are connected by phone lines, fiber optic lines, coaxial cable, satellites, and wireless connections. When you log on to the Internet you are given access to many of the other computers that are connected around the world.
Some common ways of connecting to the Internet include:
• Internet service provider (ISP) by modem
• Internet ready cable
• digital subscriber line (DSL)
• simply turning on your computer which is on a network at work or school connected to the Internet
• Today you can even get a wireless connection to the Internet with a handheld PC or notebook computer.
Regards,
Bornok Walensha D. (0831008)
[INTERNET`]
BalasHapusA global network connecting millions of computers. More than 100 countries are linked into exchanges of data, news and opinions.
Unlike online services, which are centrally controlled, the Internet is decentralized by design. Each Internet computer, called a host, is independent. Its operators can choose which Internet services to use and which local services to make available to the global Internet community. Remarkably, this anarchy by design works exceedingly well.
There are a variety of ways to access the Internet. Most online services, such as America Online, offer access to some Internet services. It is also possible to gain access through a commercial Internet Service Provider (ISP).
Junianto.-
[0831035]
yo i bu...
BalasHapuswelcome..
ini kan demi kebersamaan kita juga,kalau bagus kan enak juga kita nya membaca..
kalau gak kan paling kita cuma post comment aja :(
oh iya bu,ada suggest lagi neh...
gmn kalau dibuatkan readmore
http://www.eblogtemplates.com/how-to-add-the-blogger-read-more-expandable-posts-link
soalnya ya kalau namnya website or blog 1pagenya scrol verticalnya tlalu bnyk kan ga bagus tuh..
(untuk example bisa liat di blog saya- di klik aja nama saya diatas itu ^^)
Best Regards,
Rico Ade Trisatria
I'm so sorry for late (better than not post ^^)
BalasHapusWhat is the Internet?
Internet is a global system of interconnected computer networks that use the standardized Internet Protocol Suite (TCP/IP) to serve billions of users worldwide. It is a network of networks that consists of millions of private and public, academic, business, and government networks of local to global scope that are linked by copper wires, fiber-optic cables, wireless connections, and other technologies. The Internet carries a vast array of information resources and services, most notably the inter-linked hypertext documents of the World Wide Web (WWW) and the infrastructure to support electronic mail. In addition it supports popular services such as online chat, file transfer and file sharing, gaming, commerce, social networking, publishing, video on demand, and teleconferencing and telecommunications. Voice over Internet Protocol (VoIP) applications allow person-to-person communication via voice and video.
The origins of the Internet reach back to the 1960s when the United States funded research projects of its military agencies to build robust, fault-tolerant and distributed computer networks. This research and a period of civilian funding of a new U.S. backbone by the National Science Foundation spawned worldwide participation in the development of new networking technologies and led to the commercialization of an international network in the mid 1990s, and resulted in the following popularization of countless applications in virtually every aspect of modern human life. As of 2009, an estimated quarter of Earth's population uses the services of the Internet.
Hengky
(0831020)
Ms. Ayu...
BalasHapusWhere is the Networking materials for tonight lesson??
Thanks...
be patient vid..
BalasHapusibu juga manusia..
gak sempat cek blog kyknya tuh..:(
Analysis of the current system
BalasHapusAlso known as: feasibility stage. Analyze the current situation at a high level. A Data Flow Diagram (DFD) is used to describe how the current system works and to visualize known problems. The following steps are part of this stage:
* Develop a Business Activity Model. A model of the business activity is built. Business events and business rules would also be investigated as an input to the specification of the new automated system.
* Investigate and define requirements. The objective of this step is to identify the problems associated with the current environment that are to be resolved by the new system. It also aims to identify the additional services to be provided by the new system and users of the new system.
* Investigate current processing. It investigates the information flow associated with the services currently provided, and describes them in the form of Data Flow Model. At this point, the Data Flow Model represents the current services with all their deficiencies. No attempt is made to incorporate required improvement, or new facilities.
* Investigate current data. This step is to identify and describe the structure of the system data, independently of the way the data are currently held and organized. It produces a model of data that supports the current services.
* Derive logical view of current services. The objective of this step is to develop a logical view of the current system that can be used to understand problems with the current system.
Outline business specification
Also known as: logical system specification stage. This stage consists of 2 parts. The first part is researching the existing environment. In this part, system requirements are identified and the current business environment is modeled. Modeling consists of creating a DFD and LDS (Logical Data Structure) for processes and data structures that are part of the system. In the second part, BSO (Business Systems Options), 6 business options are presented. One of the options is selected and built.
The following steps are part of this stage:
* Define BSOs. This step is concerned with identifying a number of possible system solutions that meet the defined requirements from which the users can select.
* Select BSO. This step is concerned with the presentation of the BSOs to users and the selection of the preferred option. The selected option defines the boundary of the system to be developed in the subsequent stages.
Detailed business specification
Also known as: requirements specification stage. To assist the management to make a sound choice, a number of business system options, each describing the scope and functionalities provided by a particular development/implementation approach, are prepared and presented to them. These options may be supported by technical documentation such as Work Practice Model, LDM (Logical Data Model) and DFD. They also require financial and risk assessments to be prepared, and need to be supported by outline implementation descriptions.
jhon piater
(0831112)
i think nowadays computer network is needed by many people, from student like us to the business man.. especially in business, in order to expand their business faster,they can use internet with can make the people know about their product... the information technology can be use to storing information,protecting, transmitting, and also retrieving the information.. willing yap(0831110)
BalasHapusLAN - Local Area Network
BalasHapusA LAN connects network devices over a relatively short distance. A networked office building, school, or home usually contains a single LAN, though sometimes one building will contain a few small LANs (perhaps one per room), and occasionally a LAN will span a group of nearby buildings. In TCP/IP networking, a LAN is often but not always implemented as a single IP subnet. In addition to operating in a limited space, LANs are also typically owned, controlled, and managed by a single person or organization. They also tend to use certain connectivity technologies, primarily Ethernet and Token Ring.
MAN – Metropolitan Area Network
Metropolitan Area Network - a network spanning a physical area larger than a LAN but smaller than a WAN, such as a city. A MAN is typically owned an operated by a single entity such as a government body or large corporation.
WAN - Wide Area Network
As the term implies, a WAN spans a large physical distance. The Internet is the largest WAN, spanning the Earth. A WAN is a geographically-dispersed collection of LANs. A network device called a router connects LANs to a WAN. In IP networking, the router maintains both a LAN address and a WAN address. A WAN differs from a LAN in several important ways. Most WANs (like the Internet) are not owned by any one organization but rather exist under collective or distributed ownership and management. WANs tend to use technology like ATM, Frame Relay and X.25 for connectivity over the longer distances.
Mark Harlem
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