What is a Computer network? – Faculty of Engineering

Computer Network is a telecommunications network that allows between computers to communicate with each other using data exchange, personal computer networks are built using a combination of hardware & applications. When two or more computers communicate with each other or exchange data there are actually parts according to the computer network that as the party receiving or requesting the service is considered to be with the client & who puts or sends the claimed with the server. Design for example is often referred to as using the Client-Server System.

This interconnected computer must also have at least 1 network card each which is then connected via cable as well as wireless as a medium for data transmission and there is still network operating system software that will form a simple computer network. If you want to create a personal computer network that has a wider range, you need additional equipment to support it such as Hubs, Switches, Routers, etc.

There are several types of computer networks that we often see and classify based on their area, namely:

  • LAN (Local Area Network)

LAN or Local Area Network is a concept that connects network devices within a short distance. Usually used for school buildings, workplaces, residences, etc. This LAN network concept tends to use certain connectivity, including Ethernet & Token Ring.

There is also a LAN that uses Wireless or wireless network technology with WI-FI and is known as a Wireless Local Area Network (WLAN).

  • MAN (Metropolitan Area Network)

MAN or Metropolitan Area Network is a concept that connects network devices from one City to another. if the use of LAN is not possible to form a network, the MAN network will be used, because the scope is larger according to LAN, MAN uses special devices and requires telecommunications operators who serve as connections between computer networks.

  • WAN (Wide Area Network)

WAN or Wide Area Network is a concept that connects personal computer network devices that cover a super wide area & use super sophisticated tools when compared to MAN & LAN.

The concept of this network itself is generally used to connect a network from one country to another, aka between countries, even between continents. One example of super sophisticated equipment is fiber optic where the installation is planted on the ground as well as under the sea.

In the construction of this computer network itself, it is not dated based on the name of the topology, where this topology itself is able to be said to be the form or dream structure of the network which refers to tidying up the location of connected devices even though this form is always synchronous using tidy up the actual physical location of the network device.

Network topologies can be categorized into the following basic types, namely:

  • This BUS topology only uses one cable as a communication medium or transmission medium and the cable is the center for all connected servers. Each personal computer is connected to the main cable using a BNC connector, then at the end with a terminator. Here’s a model image of the BUS topology:

    The RING topology is a ring topology whose network builds a ring and is a point where each right and left point is connected to the other 2 points until the first computer & the last computer is connected.

    The point contained in the topology of this ring serves to strengthen the frequency in each series or is also capable of being called a reapeater. With this example method the signal and data flow will remain stable. The direction of the data flow can also be clockwise or antagonistic using clockwork, depending on the needs. Here’s a model image from the Ring topology:

    A STAR topology is a topology that has 1 link as a center (HUB or Switch) based on each connected computer. The hub or switch is positioned in the central & functions to connect one personal computer to each connected computer and also connect the personal computer to the archive server.

    The way it works is that if you want to exchange data with each other, the data will flow to the HUB or Switch first and then it will go to the personal computer that requests or who will receive it. Here is an example of an image based on a STAR topology:

    A Mesh topology is a topology whose networks can connect to each other randomly or irregularly. Because the exclusive computer is connected using the intended personal computer, the data flow can be directly carried out quickly without having to go through another computer.

    Each personal computer has at least 2 types of connections, namely the first cable that is connected to other personal computers and the other cable is connected to the File Server. This topology is suggested for use which is a mini scope not a big one because this Topology is very difficult to control & complicated in managing the connection.

    Tree Topology is a topology that is stratified & hierarchical between connections using a Hub or Switch as its transmission medium & each according to the hub or switch is connected to the Server file.

    Tree Topology is actually a combination of STAR Topology & BUS Topology but what distinguishes it is this tree topology there are many Hubs or Switches in the network & hierarchical system.

    Here is a simple overview of what a computer network is, its types, & the basic topology used in creating a Computer Network.





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