Network Model

 The term computer network model defines the category in which a computer network can be grouped into. Networks are divided into two broad categories:

1.Peer to peer or Workgroup Model

2.Domain based model or Client/server model

1.Peer to peer or Workgroup Model

When nodes or workstations perform the same communication functions, they are referred to as peers, in this network model, both server and client operations are performed by the same computer. Each user administers his/her workstation and the resources in it. In a peer-to-peer network, there are no dedicated servers, and there is no hierarchy among the computers. All the computers are equal and therefore are known as peers. Each computer functions as both a client and a server, and there is no administrator responsible for the entire network. The user on each computer determines which data on that computer is shared on the network.

Advantages of using peer to peer

• They are easy to configure
• Computers communicate easily.
• They don’t require additional server hardware or software
• Users can manage their own resources.
• They don’t require a network administrator
• They reduce total cost of network setup.

Disadvantages of using peer to peer

1. They provide a limited number of connections for shared resources.
2. Computers with shared resources suffer from sluggish performance.
3. They don’t allow for central management
4. Users are responsible for managing resources. These resources include data in shared directories, printers, fax cards, and so on.
5. They offer very poor security.

2.Domain based model or Client/server model

This is a network model that offers centralized access to services and devices. One computer plays the role of a server. It is the most common type of network architecture today that provides centralized data storage, security, manning of applications and network administration. Most servers operating system are Novel Netware, Windows NT, Apple talk, Linux, Banyan VINES etc…

Disadvantages

• Cost: – More expensive in terms of hardware and network operating system.
• Complexity: – Experienced system administrators are required to manage the systems.
• Dependence: – When server goes down, operations will cease across the network.

Advantages

1. They are best suited for 10 or more users.
2. Security: – All major server based systems provides sophisticated security.
3. Administration: – Servers are centralized making them easier to manage.
4. Stability: – Server based systems are designed to support a wide range of organization sizes. Additional servers are added to increase capacity.
5. Client server networks offer centralized backup where data can be stored in one server.
6. Flexibility – New technology can be easily integrated into the system.
7. Accessibility – Server can be accessed remotely and across multiple platforms.

Applications of Computer

 There are many applications of computers and which are used in various fields.

Below are the names of the fields where the applications of a computer are used.

• Education & Training centers
• Business
• Banking & Financial company
•  Entertainment
• Engineering
• Accounting
• Communications
• Digital Advertisement
• Pharmacy & Hospital
• Office
• Library
• Transporting
• Gaming
• CAD/CAM

Applications of Computer in Education

In the field of education too, the application of computer is being used to teach children in every school, college, the university today.

Through education applications, children are being taught in an even better way so that children are reading and understanding better. Through education applications, you can read and create digital books, digital notes. There are many applications of such education that run through the internet.

Today in every training center such as a computer training center, driving training center and many more training centers are being taught using training applications.

Applications of computer in Business

Computers are also being used in the field of business so that the business can be made more profitable and the business of businessman becomes even easier.

There are many business applications in the market today for business as well.

Through these business applications, you can completely monitor your business like - do calculations, give e-bill or paper bills to customers, do sales analyses, check price, check stock of an item, how much is left in stock now is.

Applications of computer in Banking & finance

Even in the banking sector, today all the work is being done in every bank with the use of a computer.

With the use of computers, the work of banks has become fast and convenient, due to which bank customers are also getting a lot of benefits.

Today every bank in the world is dependent on computers because every bank does its work from computers like - printing bank holder's passbook, opening new accounts, electronic fund transfers, e-banking, and many more. are done by computer. The basic work of a finance company is to give loans to its customers, before giving a loan, this company checks the credit score of that customer, after that, it decides whether to give a loan or not.

 Applications of Computer in Entertainment

Computers are also being used tightly in the field of entertainment.

Today, the computer is the only means of entertainment for people around the world, due to which people never get bored and the number of people who are being entertained by computers is increasing day by day. The VLC media player is an entertainment application and there are many other types of entertainment that are given below.

• YouTube
• Amazon Prime
• Netflix

These are all entertainment applications.

Applications of Computer in Engineering

Computers are also being widely used in the engineering sector.

Today the engineer is able to complete every one of his projects through the computer only.

Engineers used to make blueprints of their projects from sketches, which take them a lot of time, but today engineers make blueprints of their projects from computers, which saves them a lot of time.

For example, civil engineers design the map of a house, complex, mall with CAD (computer-aided design).

CAD (computer-aided design) is a 2D and 3D designing application.

Mechanical engineers also use designing applications to make model designs of vehicles.

 Applications of Computer in Communication

Even in the field of communication, people are able to communicate with each other only through computer applications.

Through communication application, whenever people want to talk, they can talk to anyone.

The specialty of these applications is that it delivers your message within a few seconds from which you send the message.

These communication applications will be used by almost all the people of the world.

Through these communication applications, you can communicate with text, voice, and video.

Human Brain vs Computer

 

Key Differences Between Brain and Computer

1. The brain can have 100 teraflops of memory with a density of 107 circuits per cm3 while computer memory has the 100 million megabytes with a density of 1014 bits per cm3. Memory in brain grows instantly just by connecting synaptic link whereas in a computer to scale the memory the chips need to be added.
2. Brain has the inbuilt backup system where the functioning pathways replace the damaged pathways. As against, backup systems are constructed manually in a computer.
3. The energy consumption in the brain is less than the computer.
4. To store information the brain uses electrochemical and electromagnetic form. Conversely, in a computer, the information is stored in the symbolic and numeric form.
5. In the brain, the information is transmitted with the help of chemicals to fire action potential in the neurons. On the contrary, the computer uses electrically coded signals to transmit the data.
6. The processing power of the brain is unlimited and provides online processing, but the brain processes information at slow speed because neurons are slow in action. In contrast, the processing power of computers is significant because of fast transistors.
7. The brain is self-organised while the computer is preprogrammed structure.