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Computer Network


Information Technology has served as the basis for storing information, processing information, disseminating and distributing information in various forms and ways. Such material or information may be used in the form of text, images, graphics, sound, animation, and video, or an interactive combination of all elements, also known as Multimedia. All materials can be channeled using the latest technology, whether it is networking, intranet and internet.

The teaching-learning process can be further enhanced and diversified through its delivery and acceptance through several techniques:

1. Help computer and software

2. through networking (networking) systems, software and databases or information or

3. Through internet systems, software and databases.


From the information obtained above, we can conclude that the Networking System also played an important role in the era of information technology. A computer network system is a computer system that connects with terminals and other peripheral equipment through a communication line. Networks allow users in a variety of geographic distribution positions to share programs, data, and equipment. This computer network technology was originally only used in the tech community as well as those who love to try out new technologies, but is now one of the most widely accepted technologies in the community.

It would not be too much to say that network technology actually opens up a whole new dimension in the use of personal computers. Newcomers who are familiar with network technology often wonder about the different features and differences that network technology brings to the computer world. Before network technology was introduced and widely used, most personal computers functioned as a single computer. First of all, it's not meant to be connected to any other computer. Therefore, the computer is only able to use the resources provided and available only on the computer. In other words, the user can only use the software and hardware available and connect to the computer only.

Before the advent of Computer Networking Systems, users who wanted to share software or files within a single computer environment had to use removable storage media such as diskettes. However, the presence of computer network technology enables what was once considered impossible to be a profitable, enjoyable and fulfilling dream of many users.



Networking System can be defined as more than one hardware contained in Information Technology that is physically separated but connected or contemplated in terms of operation. This means that the Computer Networking System is a computer system consisting of two or more computers connected to each other through a coordinated operating system even though the computers are in different places.



The existence of Computer Networking System has provided many benefits to its users. Through this network, users can share using software and files. Sharing, copying and delivery of software and files can be implemented online. This means that consumers do not have to spend large amounts of money to buy software for each unit of their computer. Users only need to buy a network version software such as LAN Version is sufficient for all computers on the network to use it.

Users can also share data or software at the same time for example three employees within a department, working using the same spreadsheet. This capability is particularly useful in the case of databases, which must be achieved and changed by multiple people within an organization.

Additionally is the ability of network users to communicate and communicate with one another. Users can also exchange messages or messages via computer through a process known as electronic mail and "chat" software in a network environment, allowing offices and workplaces to communicate and communicate with each other. In fact, sending memos and documents within a company that is traditionally a culture and way of working within an office or company has become irrelevant and useful.

Computer Networking systems also allow multiple computers to share similar hardware such as printers, scanners, CD ROMs and expensive fax equipment. For example, an office with twenty computers does not need to have twenty printers to enable them to do their printing work. A printer connected to any personal computer in the network will be able to share it with the personal computers in the network sitemap.

The concept of networking is not limited to just one location or business. The Internet, for example, is one of the few networks available, capable of connecting computer users from all over the world. Users can run computer programs from other continents and can create “home pages” so that millions of strangers can read them.

The Internet also lets students in particular as well as consumers generally find all kinds of information they want about anything from anywhere in the world simply by browsing the internet. Another advantage is that all the information they want will be available in just a short time.



Types of networks are actually defined by the geographical environment of a network. In addition, the differences between the schemes of these networks also involve distance and orientation. Typically, it is central-oriented and uses a telephone line or relies on a microwave relay to transmit data. There are three basic types of computer networks:

1. Local Area Network (LAN)

2. Metropolitan Area Network (MAN)

3. Wide Area Network (WAN)


These types of LAN networks are usually limited to small geographical restrictions such as networks that cover a building, school, office or campus. The basic function of LAN is as a network that connects a number of computers in a limited area such as on a university campus, in a building and in a room and is often connected to a mainframe computer or a computer. However, rarely do LAN networks cover more than a mile away. These computers can be connected to various methods such as twisted or twisted pair cables, optical fibers, telephone lines and infrared light and radio signals.

Each topology needs to perform the same job. The most common situations a network encounters are messages from one computer to another or instructions to run programs stored on the network. The data or program requested by the message may be stored on a computer used by a colleague on the network or on a file server (server), a specific computer. File servers are usually high-power computers and have hard disk drives that are not used exclusively by individuals on the network as well as compact CD drives. The file server should also have all the software that controls the management of that network system.

In addition, the file server exists only to serve all computers located on the network system. Computers connected to file servers are known as workstations. Workstations are not necessarily as powerful as computer servers but they can have additional software on their hard drive. Meanwhile, each computer that uses a file server service is called a client. The printer can also be connected to the network so that it is accessible to all LAN customers.

To use it, the network must accept requests from individual computers or nodes connected to the network, and it must have a way of handling simultaneous requests for its services. Once a computer receives network service, it should have a way of sending messages from one computer to another so that it only points to the required node and does not appear on another computer.

The network should do all this as quickly as possible, providing its services as efficiently as possible in turn among other nodes in the LAN.


There are three types of topological networks commonly used in LAN configuration for client-client networks. These networks are:

1. Topology of Bus or Linear Bus

2. Star (Spider) Topology

3. Token Ring Topology


The Metropolitan Area Network (MAN) typically covers a relatively large geographical area compared to the network covered by LAN. The MAN network usually operates in cities, affiliates of several schools or in one district. By running a very simple communication network within a large geographical layout, information and information can be disseminated widely, quickly and effectively.

Public libraries and government agencies usually prefer to use MAN to connect with locals and the private sector management. An example of MAN use is in Pasco County located in Florida, United States. The MAN network is known as 'the MIND Network' where it connects all Pasco media centers to centralized mainframe computers located in the district office using telephone lines, coaxial cables, wireless communication tools providers).

In business, for example, a personal computer transmits data to a single computer or mainframe. Because larger or more powerful computers are actually designed as servers, they function to allow any access to a terminal, a personal computer can communicate with a computer or mainframe.

This will only happen if the personal computer can compete or resemble a terminal. Therefore, this network will be successful when the personal computer is equipped with terminal emulation software. The larger computer then responds to the personal computer or work station as another user in the network of input-output communications.

When a smaller computer is connected to a larger computer, the connection is referred to as the micro-to-framework connection. The large computer where the terminal or personal computer is connected is known as a host computer. If a personal computer is used as a terminal, file transfer software allows the user to transfer files from the host or send data to the host (upload). Downloading files means opening and retrieving data from another personal computer and sending the data to the appropriate computer as requested by the user. Uploading a file means that the user opens the data file and sends it to another computer.



Wide Area Network (WAN) connects a broader geographical area, for example connecting Florida, the United States with the world.


The WAN network is able to connect Florida schools with other places in the world such as Tokyo in just minutes, without having to spend a lot of money to pay for their phone bills. However, this WAN network is rather complex and complex. It requires a variety of hardware and software before enabling local and metropolitan networks to communicate globally and internationally such as the Internet. At birth, the WAN network looks almost identical to the LAN or MAN.

Typical Area Networks combine two or more Local Area networks and typically involve a large geographical area. For example, a company has a headquarters in one place, a factory in another and a marketing mix in an area that is quite far from both.