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20 February, 2022

Discuss about the Electronic Fund Transfer (ETF) system and its benefits.

 Electronic funds transfer (EFT) is the electronic exchange, transfer of money from one account to another, either within a single financial institution or across multiple institutions, through computer-based systems. It is the lack of a physical representation of money, such as coins or paper or some other physical exchangeable commodity, which characterizes electronic fund transfer and electronic payments systems. An important requirement for direct transfers is that the payer’s account should contain a balance at least equal to the transaction amount at the time the transaction takes place. Otherwise, the transaction is repudiated. In other words, direct transfers do not create additional credit. An increasingly widespread example of direct transfers is electronic funds transfer at point of sale (POS), a process allowing instant payment directly from deposit balances using a debit card.

One of the most widely-used EFT programs is Direct Deposit, in which payroll is deposited straight into an employee's bank account, although EFT refers to any transfer of funds initiated through an electronic terminal, including credit card, ATM, Fedwire and point-of-sale (POS) transactions. It is used for both credit transfers, such as payroll payments, and for debit transfers, such as mortgage payments. EFT is gaining increasing popularity among the various corporate bodies. Apart from that Cabinet Ministers salaries, salary of the officials of government agencies like Ministry of Finance, Anti- Corruption  Commission  and  Salary  of  Government  Primary  School  Teachers  are  being  distributed  through  EFT  at present.

Transactions are processed by the bank through the Automated Clearing House (ACH) network, the secure transfer system that connects all financial institutions. For payments, funds are transferred electronically from one bank account to the billing company's bank, usually less than a day after the scheduled payment date.

The growing popularity of EFT for online bill payment is paving the way for a paperless universe where checks, stamps, envelopes, and paper bills are obsolete. The benefits of EFT include reduced administrative costs, increased efficiency, simplified bookkeeping, and greater security.

Electronic fund transfers have made rapid advances in recent years, and their application has become increasingly widespread. As the cost of computers and electronic communications continues to fall, and the volume of electronic payments continues  to increase,  the marginal  cost of  electronic  payments  will  fall  compared  to  the marginal  cost of cash-based transactions. This will further fuel the acceleration of electronic payments systems. To the extent that cashless means of payment reduce transaction costs, resource savings will be realized which will, over time, add to national  wealth.  Resources  released  from  the production  and  distribution  of  currency  become  available  for  more productive uses.

In EFT terminology, Originator and Receiver refer to the participants that initiate and receive the EFT entries rather than the funds. Unlike a check, which is always a debit instrument, an EFT entry may either be a credit or a debit entry. By examining what happens to the receiver’s account, one can distinguish between an EFT Credit and EFT Debit transaction. If the receiver’s account is debited, then the entry is an EFT debit. If the receiver’s account is credited, then the entry is an EFT credit. Conversely, the offset of an EFT debit is a credit to the originator’s account and the offset to an EFT credit is a debit to the Originators account.


A  typical  transaction  as  it  flows  through  the  EFT Network might follow the path described below:

The Originator and its bank (OB) determine by agreement that how the information will be delivered from the originator to the OB. Ideally, the originating bank or originator would format the data in accordance with the BEFTN prescribed format and transmit the information to the OB via a communication line.

The  OB  generally  removes  “on‐us”  entries  (if  any)  and transmits the remaining entries to the BEFTN within the

preset timeline. An “on‐us” transaction is one in which the Receiver and the Originator both have accounts at the same bank. Therefore, the transaction needs not to be sent through BEFTN but instead may be simply retained by the bank and posted to the appropriate account.

The BEFTN will sort the entries by Receiving Bank (RB) routing number and transmit the payment information to the appropriate RB for posting.

On settlement date/time, BEFTN will calculate the net settlement figure for each participating bank and the settlement will take place at the books of accounts of Bangladesh Bank.

 


What is computer network? Discuss various networks (LAN, WAN, intranet and Internet).

 A computer network is an interconnection of various computer systems located at different places. In computer network two or more computers are linked together with a medium and data communication devices for the purpose of communicating data and sharing resources. The computer that provides resources to other computers on a network is known as server. In the network the individual computers, which access shared network resources, are known as workstations or nodes.

Type of Network:

Type of Network according to geographical area

Local area network (LAN)

Networks used to interconnect computers in a single room, rooms within a building or buildings on one site are called Local Area Network (LAN). LAN transmits data with a speed of several megabits per second (106 bits per second). The transmission medium is normally coaxial cables.

LAN links computers, i.e., software and hardware, in the same area for the purpose of sharing information. Usually LAN links computers within a limited geographical area because they must be connected by a cable, which is quite expensive. People working in LAN get more capabilities in data processing, work processing and other information exchange compared to stand-alone computers. Because of this information exchange most of the business and government organizations are using LAN. ARCNET, Token Ring and other technology standards have been used in the past, but Ethernet over twisted pair cabling, and Wi-Fi are the two most common technologies currently used to build LANs. LANs can be connected to Wide area network by using routers.

  Major Characteristics of LAN

 Fig: LAN

   Every computer has the potential to communicate with any other computers                      of the network

         High degree of interconnection between computers

         Easy physical connection of computers in a network

         Inexpensive medium of data transmission

         High data transmission rate

 

Advantages

        The reliability of network is high because the failure of one computer in the network does not affect the functioning for other computers.

         Addition of new computer to network is easy.

         High rate of data transmission is possible.

         Peripheral devices like magnetic disk and printer can be shared by other computers.

 Disadvantages

If the communication line fails, the entire network system breaks down.

Use of LAN

Followings are the major areas where LAN is normally used

         File transfers and Access

         Word and text processing

         Electronic message handling

         Remote database access

         Personal computing

         Digital voice transmission and storage

MAN: MAN is short for Metropolitan Area Network and refers to low-speed networks that cover a large distance, for example a network that spans several cities. MAN is a collection of some LAN network.



 Fig: MAN

·        Bigger version of a LAN and might be either private or public.

·        It might covers a group of nearby corporate offices or a city (50 kms).

·        Developed in 1980s.

·        Medium : Usually connected with optical fiber cables.

 

Wide area network

A wide area network (WAN) is a computer network that covers a large geographic area such as a city, country, or spans even intercontinental distances, using a communications channel that combines many types of media such as telephone lines, cables, and air waves. For example, for a large company the headquarters might be at Delhi and regional branches at Bombay, Madras, Bangalore and Calcutta. Here regional centers are connected to headquarters through WAN. The distance between computers connected to WAN is larger.  Therefore the transmission medium used are normally telephone lines, microwaves and satellite links.




Characteristics of WAN

Followings are the major characteristics of WAN.

1)   Communication Facility: For a big company spanning over different parts of the country the employees can save long distance phone calls and it overcomes the time lag in overseas communications. Computer conferencing is another use of WAN where users communicate with each other through their computer system.

2)   Remote Data Entry: Remote data entry is possible in WAN. It means sitting at any location you can enter data, update data and query other information of any computer attached to the WAN but located in other cities. For example, suppose you are sitting at Madras and want to see some data of a computer located at Delhi, you can do it through WAN.

3)  Centralized Information: In modern computerized environment you will find that big organizations go for centralized data storage. This means if the organization is spread over many cities, they keep their important business data in a single place. As the data are generated at different sites, WAN permits collection of this data from different sites and save at a single site.

Examples of WAN

1.   Ethernet: Ethernet developed by Xerox Corporation is a famous example of WAN. This network uses coaxial cables for data transmission. Special integrated circuit chips called controllers are used to connect equipment to the cable.

2.   Arpanet: The Arpanet is another example of WAN. It was developed at Advanced Research Projects Agency of U.

S. Department. This Network connects more than 40 universities and institutions throughout USA and Europe.

Virtual private network

A virtual private network (VPN) is a computer network in which some of the links between nodes are carried by open connections or virtual circuits in some larger network (e.g., the Internet) instead of by physical wires. The data link layer protocols of the virtual network are said to be tunneled through the larger network when this is the case. One common application is secure communications through the public Internet, but a VPN need not have explicit security features, such as authentication or content encryption. VPNs, for example, can be used to separate the traffic of different user communities over an underlying network with strong security features.

VPN may have best-effort performance, or may have a defined service level agreement (SLA) between the VPN customer and the VPN service provider. Generally, a VPN has a topology more complex than point-to-point.

Intranets and extranets

Intranets and extranets are parts or extensions of a computer network, usually a LAN.

An intranet is a set of networks, using the Internet Protocol and IP-based tools such as web browsers and file transfer applications, that is under the control of a single administrative entity. That administrative entity closes the intranet to all but specific, authorized users. Most commonly, an intranet is the internal network of an organization. A large intranet will typically have at least one web server to provide users with organizational information.

An extranet is a network that is limited in scope to a single organization or entity and also has limited connections to the

networks of one or more other usually, but not necessarily, trusted organizations or entities—a company's customers may be given access to some part of its intranet—while at the same time the customers may not be considered trusted from a security standpoint. Technically, an extranet may also be categorized as a CAN, MAN, WAN, or other type of network, although an extranet cannot consist of a single LAN; it must have at least one connection with an external network.

Internet

The Internet is a network of networks. Millions of computers all over the world are connected through the Internet. Computer users on the Internet can contact one another anywhere in the world. If your computer is connected to the Internet, you can connect to millions of computers. You can gather information and distribute your data. It is very much similar to the telephone connection where you can talk with any person anywhere in the world.

In Internet a huge resource of information is accessible to people across the world. Information in every field starting from education, science, health, medicine, history, and geography to business, news, etc. can be retrieved through Internet. You can also download programs and software packages from anywhere in the world. Due to the tremendous information resources the Internet can provide, it is now indispensable to every organization.


 Intranets and extranets

 


Figure 3.4  The relationship between intranets, extranets and the Internet

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Private and Public Networks

Two other terms used to categorize networks are private networks and public networks.

A private network is typically within the premises of a corporation and can be accessed only by users working for, or related to, that corporation. Example: Network of Brac Bank Limited.

A public network Internet can be accessed by multiple individuals and/or corporations, the best example of a public network is, the Internet.