A computer network is a system that connects several personal computer devices to be able to exchange data with each other.
This system is organized according to the client, server and a number of other devices.
A client is a computer that requests & receives services. A server is a computer in charge of running a service or service.
The scheme is claimed to be also with a client-server system.
For other devices that support computer networks include: network cables, routers, repeaters, etc.
In addition to hardware, personal computer networks are supported by certain applications, algorithms, and protocols. That is what makes data exchange possible. What are the Functions & Benefits of Computer Networks
In general, the function of a computer network is to create every personal computer device capable of being connected to each other. Once connected, each device can communicate with each other and exchange data.
Furthermore, a personal computer network will provide a number of benefits, namely:
- Facilitate resource sharing, for example developing files, sharing internet access, developing hardware access such as printers.
- Facilitate communication between users, even though they are far apart from each other.
- Speed up the distribution of captions.
- Helping data management as a result of which users can easily access it & data is able to be more conducive.
- Supporting entertainment needs, for example for playing games in groups.
Those are some of the benefits of having a personal computer network.
Personal computer networks have now become commonplace for a company or daily necessities. The internet is also one of the most widely scoped computer networks.
In addition, there are still several other types of networks that are smaller in scale to meet exclusive needs. We will discuss this in the next point. Types of Computer Networks
The following are some of the types of computer networks that people know in general.#1. Personal Area Network (PAN)
This type of network is relatively small in scope. For example, for the coverage of one house or one room at work.
Usually for sharing internet access or printers.#2. Local Area Network (LAN)
LAN coverage is still relatively small but slightly more grand according to PAN.
LAN applications generally include one room or several rooms that are still close together.
In one area such as campuses, hospitals, schools, etc. it is possible to have multiple LAN networks in exclusive areas.
To connect it, relatively wear a cable or hub.
As in PAN, LAN is also able to spread access to printers, photocopiers, or internet networks.
Generally, the preparation of a LAN network uses cables. But now there is a WLAN or wireless LAN network (wireless LAN).#3. Metropolitan Area Network (MAN)
This network covers a wider area. Its scale almost covers 1 city or approximately 50 km.
MAN is formed based on several LANs in a specific geographic area, then interconnected until it covers one large region.
Universities or hospitals whose areas are large generally apply this type of network.
To connect it, it takes several devices such as optical fibers, a number of switches and routers.#4. Campus Area Network (CAN)
In principle, CAN is similar to MAN. It’s just that the coverage area is more particular, that is, the environment of the college or school.
This network is used to support educational activities such as academic systems, management information systems, administrative systems, etc.#5. Wide Area Network (WAN)
Basically, WAN is a group of LANs based on a lot of interconnected geographical locations. It’s just that the scope can reach one country, even a continent.
The Internet is a public WAN model using worldwide coverage.
An example of a WAN network that is smaller in scale is a company with branch workplaces in several cities or countries.
The company uses a WAN network to connect all elements of the organization. In addition, WAN networks can also distribute a cloud-based service or services.#6. Virtual Private Network (VPN)
In general, the internet network is very insecure. VPN is a solution to secure the connection on the internet network or WAN.
A VPN will create a number of restrictions to secure the connection. Computer Network Topology
Computer Network Topology is a network structure, relating to using the scheme of compiling devices in a network.
Here are the types of network topologies.1. Bus TopologySource: hitechmv.com
The bus topology is connected using one central cable. In the central cable there are several connectors. Each device is connected to the central cable through the connector.
This type is relatively easy to install. If you want to add a new device, it will also not interfere with the performance of other devices.
However, if the central cable has a problem, all devices in the network will be affected. In other terms, the whole network will drop.two. Source Ring Topology: hitechmv.com
Another name by this type is the ring topology. Its name resembles its circular structure.
So each node will be connected by cable in series.
In this type, data transmission will pass through other devices.
One of the advantages of this type is the absence of data collisions. But when one node error is problematic, the network system will not operate. 3. Star TopologySource: hitechmv.com
In this topology, the path between the client and the server or hub is arranged independently. So each client device has a single cable to the hub or server.
The advantage is the relatively stable performance of the network system. For example, one client connection has an error, another client is still able to operate in a network system.
In addition, the performance of the network system can also be better because the bandwidth on each cable will be wider.
Unfortunately this topology is quite expensive to install.4. Tree TopologySource: hitechmv.com
The topology of a tree resembles the root of a tree. It is a combination of bus and star topology.
In a tree topology, the bus structure consists of several hubs. Each hub will connect a number of devices. That’s where the star structure forms.
In general, the hybrid scheme in the star topology makes it easier for you to expand the network coverage. On the other hand, this topology also inherits some of the advantages and disadvantages of bus and star topologies. five. Mesh TopologySource: hitechmv.com
The principle based on this topology is to connect all devices in the network to each other.
In this topology, there will be no absolute transmission break. In other words, even if one connection error has a problem or drops, the transmission will still run.
In addition, this topology also has advantages in the speed of data transmission. The security is better because the communication line can be exclusively client who specifically receives.
But this topology is very sporadic people use. Although there are poly benefits & advantages, but the cost is too expensive.
Just imagine, how many poly cables will be spent. The installation will undoubtedly be messy.
Those are some of the network topologies that people know generically. if you want to create a network installation, choose one of the topologies that is most in sync with the budget, area, and needs. Kinds of Computer Network Devices
Above we mentioned several devices that create a network. Here is the full discussion.
- Server. A server is the core computer that controls the network. This computer acts as a service provider & data storage media for network management.
- Network Interface Card (NIC). Its other name is network card. These NICs are embedded in each computer device. In NICs, there is still a socket that allows personal computers to be connected using a cable.
- Network cable. This cable will facilitate data transmission & so the medium for connecting personal computer devices to the network. The type that people use generically is fiber optic & twisted pair (LAN cable).
- Hubs and Switches. This tool allows connections to be made to more than one computer. The two senses are indeed similar, but they are not the same. Hubs are simpler, while switches are smarter.
- Bridge. This tool connects each network segment. In addition, this tool is also able to divide a large network as a smaller segment.
- Router. This is a mediator for LAN networks & WAN network systems to be able to connect with each other. This tool also works to manage data traffic in the system through it.
- Repeater. It is a tool to amplify the internet signal.
- Modem. A sense of connection using internet services from an ISP.
You Need a “Computer Network” to Connect With Each Other
The existence of a personal computer network allows each personal computer device to be able to connect to communicate & exchange data.