Siz Approved Courses|Lecture 02|Introduction to Networks|20% to Siz-official
Hello steemians! How are you today? I hope you are doing fine. In my last lecture I treated Networking essentials in which I explained Networking, A network, and some basic networking devices.
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MAIN LECTURE
NETWORK TOPOLOGY
COMPONENTS OF A NETWORK
CLASSIFICATION OF NETWORKS
TYPES OF NETWORKS
CONCLUSION
Click here to read. Today in this lecture, I will be focusing more about Networks. Read on.
A network is simply a connection of two or more computers, which are linked together in a particular order for the purpose of sharing resources, exchanging files or the purpose of electronic communication. The performance of a network s determined by the topology or configuration of the network.
Network topology refers to the way nodes in a network are arranged in other to correspond to each other. This is also the physical or logical description of how links and nodes are setup to relate to each other. There are various network topology or configuration and also there are two approach to network topology.
The two main approach which are considered when creating a network topology are the physical and logical approach.
PHYSICAL APPROACH:
This relate to the physical connection and interconnection between the nodes and the network. It involves the use of physical medium of connection such as cable and wires.LOGICAL APPROACH:
Logical approach refers to the strategic and scientific method of arranging a network to create mutual understanding between the neworked devices. This approach is a more complex arrangement and logical method of how a network is being connected and as well as how the network transmit data.
TYPES OF NETWORK TOPOLOGY STAR TOPOLOGY:
This type of topology connect all nodes in the network directly to one central hub by the use of twisted coaxial or fiber-optic cable. The central hub acts as the sever to all node and manages data transmission.
Here is a good example of a star topology.
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- BUS TOPOLOGY:This connect all the devices or node in a network along a single cable running in a single direction from one end of a network to another end. Sometimes the bus topology is called line topology and data flow in this type of network moves in one direction
- RING TOPOLOGY:As the name implies all nodes in the network are arranged and connected in a form of a circle. The data flow through this topology moves in a clockwise direction
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- MESH TOPOLOGY:A mesh topology is a very complex and sophisicated structure of interconnected node and point to point connections. This topology can either be full mesh or partially mesh. Full mesh topologies are fully interconnected with many node and more than three connections, while partial mesh are interconnected with fewer nodes and less than three topologies. Here is an example of a full topology
- HYBRID TOPOLOGY:This type of topology coinsist the combination of two or more types of topology. This setting are usually found in huge companies where different sections of the companies require specific network topologies to adapt to their need.
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Looking at this diagram you can see it is a combination of both ring and star topology.
From the above explanation of network topologies we can easily draw out the component of a network. Before any type of network can be created there are networking equipment that are needed. The network componet needed depend in the type of network you want to create. Let take a look at some basic networking components.
- A Network interface controller(NIC)
- A Communication medium(wireless and wired)
- A node(a device which is able to send or receive data such as computer and printer )
- A network operating system (NOS)
- WIRED NETWORK:A wired network uses a physical medium such as fiber optic cables to connect nodes and transfer data between a network. Here is an example of a wired networked.
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- WIRELESS NETWORK:This uses non-physical medium such as electromagnetic waves or infared rays to transfer data between two nodes.
- Personal Area Network[PAN]
- Local Area Network [LAN]
- Wide Area Network[WAN]
- Metropolitan Area Network[MAN]
- Campus Area Network[CAN]
- Storage Area Network [SAN]
- Passive Optical local Area Nework[POLAN]
- Enterprise private network[EPN]
- Virtual Private Network [VPN]
I hope you learnt a lot about network through this post. I would like to thank @siz-community, @cryptokraze for giving me this opportunity to share my ideas in this community.