Timesofummah.com – The era that continues to develop rapidly gives rise to new things, namely modern technology that is increasingly sophisticated, especially technology in the field of communication. The rapid development of modern technology can be seen from the presence of various kinds of information and communication technology innovations. One of the innovations in information and communication technology is the internet.
The presence of the internet today allows a person to be in touch with everyone in the world. In fact, the communication process can be done in real-time only by using the internet network. There are several terms for this internet network, including LAN, MAN, WAN.
Before going into the discussion about the internet network. We first on the computer network. What is a computer network? So, a computer network is a collection of computer devices that are connected to each other so that they can exchange data and communicate with each other. There are various types of computer networks. LAN is one type of computer network that is reviewed based on its geographic range. Besides LAN, there are other computer networks such as MAN and WAN.
This article will review the meaning of LAN, how to build a LAN network, characteristics of a LAN, the purpose and function of a LAN, components of a LAN network, and the advantages and disadvantages of a LAN. Let’s see,
What is the Definition of LAN?
LAN is an abbreviation of Local Area Network (LAN) is a computer network that covers the local area only. That is, this network can only be used by users in the LAN area only. LAN connects the device to the internet network via a simple network device.
This LAN network usually has cables such as UTP, Hub, Switch, or Router. An example of this network is a network of computers in schools, companies, or internet cafes (warnet). This network has a limited area it is usually a LAN network. So, the LAN network has a small scale (local).
LAN networks are usually used to share resources in buildings. LAN can stand alone, without being connected by an external network or the internet. However, if a LAN is connected to several other LANs, a new network will be formed, which is called a Metropolitan Area Network (MAN).
So it can be understood that the LAN is a computer network where the network area coverage is very small and limited. A network which is also defined as a computer communication system whose distance is limited to no more than a few kilometers. LAN networks use high-speed connections between 2 to 100 Mbps.
How to Build a LAN Network?
How to build a LAN network? LAN networks can be built using wired (cable), wireless (without cables) or both methods. Wired LANs are built using Ethernet and wireless LANs are built using a Wifi signal. LANs are mostly used in homes that use a router to create a network and manage connected devices.
The router here is useful as a connection center and allows devices such as cellphones, computers, laptops, and tablets to be connected to each other. The router is usually connected with a cable or modem that has internet access on the connected devices.
Computer devices can also be used as a LAN center. The computer device that will be used as the LAN center acts as a server while providing access to share files or programs on connected devices. This has often been applied to networks in offices and institutions.
What are the characteristics of a LAN?
LAN as a network with local area coverage has several characteristics that are easy for us to identify. These characteristics will distinguish LAN networks from other networks such as MAN (Metropolitan Area Network) and WAN (Wide Area Network) networks. The following are some of the characteristics of a LAN, namely:
- LAN network does not use telecommunications networks from additional operators.
- LAN networks are usually used for personal purposes.
- LAN network administration is done via local administration.
- In a LAN network, generally there is one computer that functions as a server that is useful for managing the system so that it runs normally
- LAN networks are in a narrower geographical scope (office areas, campuses, schools, and homes).
- LAN has a higher data transfer rate because of its narrow scope
- LAN can function properly without any telecommunications lines, meaning that the LAN does not require internet access.
What is the Purpose of a LAN Network?
There are several objectives of a LAN network, including:
- Aims to connect several computers in a small area.
- Aims to enable communication between computer devices and other devices in a network.
- Aims to speed up the process of sharing data and programs between computers on a network.
- Aims to help save operational costs caused by devices on a network that can be used together (for example:printers, servers, and so on).
What is the Function of LAN?
Basically LAN has the main function to connect several computers in a network which will make the work process faster and easier. LAN network has several functions or certain uses. The following are the functions of a LAN network, including:
1. Connect two or more computers
LAN network is used to connect two or more computers. Either directly or by using intermediary media. Two computers can be connected directly by using a UTP cable that is connected to both computers. Meanwhile, if we want to combine more computers, we need to need other devices such as Switch or Hub.
2. Serves to move files from one computer to another
When we use a LAN network, we don’t have to bother inserting a flash disk back and forth from one computer to another. By using a LAN network we can easily transfer data through sharing methods on our computers.
3. There is a Sharing Printer
In addition to sharing data and moving files easily, the LAN network that we use can also allow users to share printers. This will make it easier for all users and save the cost of using it.
What to do? We can start by sharing the printer driver in the Control Panel. Once shared (to all users), the printer can be used together without having to move the computer or printer. This LAN function, perhaps we often see in internet cafes, computer rentals, or prints. When the file is ready, we can print the file according to the available printer options.
4. The existence of LAN Chat
Another function of the LAN network is that it can be used to send messages between computers in the LAN area. This activity can even be done without having to be connected to the internet, although later the LAN network will still look online. If we want to run LAN Chat, we can use Windows default applications such as winchat.exe or use other LAN Chat software.
5. As Remote Computer
If we want to do remote activities on a computer, we can use software such as TeamViewer. However, the software can only work when the computer is connected to the internet.
In a LAN network, we can do remote without having to first connect to the internet network. We can take advantage of the Remote Desktop Manager/Connection feature that has been provided by Microsoft. We can also control the computers in the LAN network.
What are the Basic Components of a LAN Network?
LAN network consists of several basic components that are arranged in such a way that it can connect several computers. There are several basic components of a LAN, including the following:
- Workstation, is a node / host on a computer system
- Server, is a piece of hardware (hardware) that serves to serve networks and workstations connected to a computer network
- Link, is part of the LAN network that connects equipment, such as workstations and servers physically.
- Network Interface Card (NIC), is a specially designed electronic circuit that is useful for handling network protocols.
- Network Software, is software (software) whose role is to run a LAN network to function properly
What are the advantages of LAN?
LAN network only has a small coverage area. With this small scope, of course LAN has its own advantages and disadvantages. The following are the advantages of a LAN network, including:
1. Can Share Resources
If we use a LAN network, we can easily share resources with other computers. This advantage will make us more efficient. In addition, by sharing resources, we can also save expenses. Because we no longer need to buy devices such as scanners, printers, and other storage media for each computer. We only need to buy one, then share it to be accessed on other computers.
Apart from sharing devices, we can also share software applications with other devices. This is a very effective advantage to simplify our time productivity. However, sharing software applications is also not always cheaper than installing software one by one on a computer. This is because a product license for each software is still required during installation.
2. Centralized Data
By using a file server, data on all computers connected to the LAN network will be stored in one place called the server. This advantage will make it easier for users to access files owned by other computers. In addition, the advantages of centralized data also help to back up user data in case of an error, thereby causing data to be deleted on the user’s computer.
If a data is shared in a network, users who have access can view the data at the same time. However, they cannot edit the same recording at the same time.
When a record is edited by a user, it is locked so that other users cannot edit it at the same time. If the user has finished editing and saving the results, the recording will reopen. This is to avoid mistakes that can occur if several people try to edit at the same time.
The range that only covers a small area means that the LAN will not drain too much of the user’s costs. In addition, the cable used is also not too long. Of course this is one of the reasons why LAN is more cost-effective.
3. Data connection between nodes will take place quickly
4. LAN network does not need a telecommunications operator to create a network
What are the Disadvantages of a LAN Network?
Where there are advantages, there must be disadvantages. The disadvantages of a LAN network are:
1. Vulnerable Security
In a computer network, security is a very vital thing that must be considered, as well as on a LAN network. Here, especially the network admin plays an important role to prevent unauthorized users from accessing data on the network.
The other factors that affect the security on the LAN network is the user himself. This is because it is possible that our users cannot keep the secret of their passwords, or maybe their passwords are too easy for other users to guess, so this causes unauthorized users to easily break into the network through that user. .
2. There is a problem with the central server
The emergence of problems on the central server can be fatal to the LAN network. This can affect the entire computer network, and can even cause computers to not communicate with other computers properly.
Virus infection is one example of problems that can occur on a central server. This virus infection can occur on one computer and spread to all computers through a central server, this is because all data on the user is centralized on the server.
3. Installation is quite expensive
Installation on a LAN network can be expensive depending on the needs and conditions in the field. The type of topology that we will use also affects the costs to be incurred. For a wired LAN network (cable) we have to make a cable path first by making holes in the wall or putting it under the floor, then attaching the cable.
In a wireless LAN network, we do not need to use a cable. However, the coverage area of the wireless is limited. Thus, we need a device to amplify the signal, which of course will increase the cost.
4. Limited connection area
Of course this deficiency is because the LAN network only covers the local area.
Recommended Books About LAN
There are several books or reading references that Grameds can read about LAN, namely:
1. Easy Steps to Build a Computer Network (2021) by Zaenal Arifin
This book is suitable for reading Grameds, this book discusses the easy steps to build a computer network. Presented in simple and easy-to-understand language, this book is suitable as an introduction and learning reference for beginners who want to start trying to build a computer network.
2. Dictionary ++ Computer Network (2021) by Budi Sutedjo
This book written by Budi Sutedjo can be read by Grameds if you want to know basic things about computer networks. This book is a complete dictionary of computer networks, for Grameds who are still confused with terms and methods in the world of computer networks, this book will be very helpful.
3. Complete Guide to Building Your Own Computer Network System (2021) by Madcoms
After reading this book by Madcoms, readers are expected to be able to identify network hardware and configure it to build a computer network. This book, published in 2021, is complete with many pictures of network hardware and illustrations of the configuration process to help readers understand the language in this book.
Thus the article about the meaning of the internet and a complete discussion. I hope it’s useful,