The computer network, types of computer networks and network topologies
There are currently more than 2.5 billion Internet-connected devices. Every second, around 8 new Internet users are added worldwide. By 2020, more than 200 billion sensors will be connected to the Internet, and it is estimated that their data will be recorded over the Internet without interruption. The Internet must be robust, well-designed, and structured to connect with such a rich ecosystem
I do my best to cover the computer network, types of computer networks, and network topologies that make up this massive system.
A computer network is a system in which computers are connected and interact with each other.
There are times when a single computer cannot be used for data processing. For example, a large number of customers are involved in a single transaction with a bank. Not all of these customer account details can be recorded using a single computer. However, if the entries are stored separately on the computer, the customer’s account information will not be updated. In such cases, computer networking is the ability to combine several computers together and store the data they enter into a single computer(server).
Types of Computer Networks
Computer networks are divided into three main types according to the way they are geographically spread.
- Local Area Network(LAN)
- Metropolitan Area Network(MAN)
- Wide Area Network(WAN)
Local Area Network(LAN)
A computer network located in a single building is called a Local Ares network. An example of this is a network of computers in a school computer room. The purpose of building such networks is to make efficient use of the existing resources of the organization.
Metropolitan Area Network(MAN)
An extensive network that covers one city or several buildings larger in size than a LAN network.
Wide Area Network(WAN)
It is a network of LANs spread over a large area covering several countries. The internet we use today belongs to this category. The ability to connect with any computer in the world without physical limitations is a special feature of such a network.
Comparison of LAN, MAN, WAN
The methodology that connects computers physically and logically in creating a computer network is called network topology. The following are some of the most commonly used physical methods.
Connects computers to a mains cable and builds a network. Two terminators are connected on either side of the main cable. When a message is transmitted on such a network, the message is sent to all the computers on the network. When a message is transmitted over the main cable, the message cannot be transmitted from another computer. The following diagram shows a model of a bus topology.
Advantages of Bus topology
- The length of the wires is shorter than the star system.
- The building is very easy because computers have to be connected linearly.
- It has the potential to cost less to build than any other network.
Disadvantages of Bus Topology
- If the mains is down, the entire network will be down.
- If there is a network error, it is difficult to find.
- Two special devices have to be attached to the two ends of the main cable.
2. Star Topology
Computer networks are devices that connect all computers connected to the network to a hub or switch, but the modern use of the hub is minimal. This is because the switch can move data around the network more efficiently than the hub. The following diagram shows a model of a star topology
Advantages of star topology
- Easy to build.
- Easily connect computers or other devices to the network as well as remove connected computers.
- Network troubleshooting is easy.
Disadvantages of star topology
- Next wiring requires more wiring.
- If a hub or switch malfunctions, all connected computers malfunction.
- The main hub device is more expensive than other methods.
3. Ring Topology
Computers connect in the form of a ring and build this network. Each computer is connected to two computers on either side of it. No centrifugal device is used. The following diagram shows a model of a Ring topology.
Advantages of Ring topology
- Data is transmitted faster because the data travels in only one direction.
- This network transmits data to a system called a token ring, which is a specialized transmission system that does not collide with each other during data transmission. This can be stated as a major advantage.
Disadvantages of Ring topology
- If a computer on the network fails, it can cause the network to crash.
4. Mesh Topology
Network-connected computers are called networks that connect all the computers on the network. The following diagram shows a model of a Mesh topology.
Advantages of Mesh Topology
- It is possible to transmit data to computers connected to the network at the same time. This is possible because the computers are connected by separate cables.
- If a computer on the network shuts down, the data transmission between other computers will not be interrupted.
- Ability to remove and reconnect existing computers from the network without interfering with network performance.
Disadvantages of Mesh topology
- Compared to other network models, network building costs more to maintain.
- Net maintenance is very complicated.
5. Tree Topology
A network created by connecting several star topology networks to a bus topology network is called a tree topology. This is called a tree topology because it connects and builds small star networks that can be controlled separately from the main cable in the way a tree branches. The following diagram shows a model of a Tree topology.
Advantages of Tree Topology
- Having separate cables for the main parts of the network makes it easy to find a problem.
Disadvantages of a tree topology
- If the mains cable is down, the entire network will be down. The wiring is difficult compared to other methods.