We will discuss COMPUTER NETWORK, Definition of computer network, History, Benefit & Types of computer network topologies
Understanding Computer Networks – Have you ever thought, how a computer can interact with other computers? How can you access and download various files from website servers located in different countries or even continents?.
Nah, All of this can happen thanks to a computer network. Simply put, a computer network is a network system that helps computers interact with each other, whether it is on a local or global scale.
In this article we will discuss Jarkom in full. Starting from what is the meaning of a computer network, history, types of devices to various devices used in building a computer network.
Understanding Computer Networks
Definition of a computer network is a network system used by computers to communicate with each other. Interaction between computers occurs through the exchange of data.
Computers that request and receive services (data) called client, while the computer that provides and sends services is called a server.
Client-server systems are currently used in almost all network models, from one-room local networks to cross-country networks. Via computer network, data can be distributed conveniently and quickly from one computer to another.
In another definition, a computer network is a system consisting of a collection of computers and other devices that are connected to each other to share resources or exchange data.
Understanding Computer Networks is a collection of computers that are connected to each other through transmission media to exchange data or share resources.
Benefits of Computer Network
Computer networks are needed to support various needs. Starting from personal use, local agencies such as schools and hospitals, to multinational companies, all of them need a network to support operational activities. Some of the benefits of networking you can see in the list below.
1. Document Sharing
Documentation is a very vital operational part in all agencies. To maximize productivity, the creation and delivery of documents between divisions must be done as efficiently as possible.
This is where computer networks play an important role. By leveraging the network, Staff working on the basement floor can send files to other staff on the floor 5 in just seconds. No network, imagine how much time is wasted just to send a document.
2. Keeping Data Confidential
Both individuals and organizations, everyone must have confidential data that must be maintained properly. Leakage of confidential data will cause harm to the owner.
With computer network, the process of sending data can be done safely. Via local network (LAN), You can exchange confidential data without worrying about being tapped or stolen by outsiders.
Even if you need to send the data via the internet, You can take advantage of various computer network security features to keep your data safe from reaching its destination.
3. Easily communicating
In any agency, communication between divisions will determine the effectiveness and efficiency of work. Communication speed can be achieved through text communication, voice, to video calls, all of which rely on network quality.
With computer network, all branch managers located in various cities can communicate with each other to overcome the obstacles faced by the company.
Executives can also monitor the condition of the company in real time through data that can be accessed remotely without having to come directly to the office. One more time, all this happens through communication between computers in a network.
4. Information Dissemination
Computer networks allow anyone to create, disseminate and access the latest information anytime and anywhere without being limited by city distance, countries and continents.
For agencies and companies, speed of access to information is very important. The faster and more complete information is obtained, more and more things to consider from various points of view, the more mature and rational the decision to be taken.
5. Save cost
Besides speed, computer network also increases cost efficiency. Try to imagine, how much does it cost to send important documents overseas manually? Not to mention the time required for the delivery process that relies on various modes of transportation. Of course this is very inefficient.
Compare with the use of computer networks. Without the need to spend a lot of money, various data and information can be sent anywhere in just seconds. The level of security is also much higher because the information is sent in digital form and is guarded by several layers of security systems.
6. Helping Community Activities
Not only useful for organizations and companies, computer networks also bring great benefits to the general public. All family members can communicate smoothly even though they live in different areas. Small traders and MSMEs can access important information to develop their business.
Young people can take various online courses and trainings as well as useful tutorials to develop their interests and talents. Various groups and forums are also scattered on the internet to accommodate people who have similar professions or hobbies.
The benefits of computer networks have been felt by everyone from all walks of life. If used properly, This technology can greatly support life and facilitate various daily activities.
Types of Computer Networks
Computer networks are divided into several types. Network classification is also determined based on several criteria such as coverage area, function, media used, and so on. An understanding of the types of networks is very important to determine the right type of network based on user needs.
1. Network Types Based on Geographical Reach
Based on the coverage area, Computer networks are divided into three types: :
- Local Area Network (LAN)
- Metropolitan Area Network (MAN)
- Wide Area Network (VAN)
Local network (LAN) is a type of network that is used for personal or small organizations where all computers are located in the same location. The range of a LAN network reaches 10 kilometer. This network is usually used for internal data exchange and the use of shared devices such as printers and scanners.
Metropolitan network (MAN)
covers a wider area up to 50 kilometers and connect multiple locations at once. Fiber optic cable is the most reliable transmission cable for this type of network.
While the WAN network is the type with the widest geographical coverage. This network connects various regions around the world. This type of network is used by international organizations. Satellite is the main transmission medium for this type of network, although many also rely on cross -country fiber optic cables.
2. Types of Networks Based on Functions
If you look at its function, computer network is divided into server-client and peer-to-peer.
Server-client networks rely on a computer specifically designed as a server to serve requests from clients. While other computers act as clients requesting data from the server.
For example, the computers in supermarkets. There is a computer specifically made as a server to store sales data. While dozens of other cashier computers act as clients that read data from the server.
It's different with peer-to-peer networks. This type of network assigns the same role to all computers. So, One computer can act as a server and a client at the same time. This network is used for simple operational models and common tasks such as file and printer sharing.
3. Types of Networks Based on the Distribution of Information Sources / Data
Based on data distribution, computer network is divided into centralized network and distributed network.
A centralized network is a network that relies on one computer as a server to store data. While other computers only act as an intermediary for storing data, process, and read data on the server computer.
If expanded, centralized network will become a distributed network. This type of network consists of several servers with different roles and functions. Thus, data will be distributed between servers and accessed by clients according to their use.
4. Types of Networks Based on the Transmission Media
At first, computer networks are only made for a small scale by relying on cable media. Wired networks require that all computers are connected to network devices via network cables to be able to communicate with each other. That's why this type of network is more suitable for local use because it will be very inconvenient if you have to connect cables between computers that are too far away.
Along with the times, Computer networks continue to evolve until the creation of a wireless network system (wireless). Communication between computers in a wireless network relies on electromagnetic waves. With wireless technology, the network can be expanded to all over the world as it is now.
5. Network Types Based on Topology
Computer network design is also divided into several types, that is :
- Bus Topology
- Star Topology
- Ring or Ring Topology
- Mesh Topology
- Tree Topology
- Linear Topology
Bus Topology is a type of topology that is very widely used until now. Each computer is connected via a coaxial cable where both ends must be terminated by a terminator.
The biggest constraint of this topology is the difficulty of measuring coaxial cable compatibility. Using an unsuitable cable will damage the Network Interface Card (THREAD) thereby reducing network performance.
Star Topology use switches/hubs to connect and manage data distribution. So, network cable not connecting between computers, but connected to a switch that is often symbolized in the middle so that it forms a star.
Requests from clients will be accommodated on the switch to be forwarded to the server. Thus, the risk of data collisions can be anticipated by the switch as a regulator of communication between computers.
Ring or Ring Topology created by connecting one computer to two other computers. If drawn in a circle, then this topology design will form a circle like a ring.
Each point acts as a signal amplifier (repeater) so that the data sent can be received in its entirety by the destination computer.
Mesh Topology or mesh topology is a type of network where each computer is directly connected to all computers in one network. Unlike ring topology, Mesh topology allows direct communication between two computers without being mediated by another computer.
Therefore, data exchange will be faster. other than that, damage
Source : https://salamadian.com/pengertian-jaringan-komputer/
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