Everyone can reach each other with a direct connection. As show Brisbane has a direct connection to Sydney, Sydney has a direct connection to Melbourne and Brisbane has a direct connection to Melbourne. The example below shows how a full mesh setup would look. The differences are explained below.įully Mesh means that every site has a WAN connection to every other site. The company can choose from either fully-meshed or partially meshed. The company would then require the ISP to connect their sites together using the ISP’s WAN. The ISP would be used to connect those sites together. As a result, the company would have to make use of an internet service provider (ISP). Even if they could afford the tremendous cost, there would be several government bodies that would stop the company from doing so. WAN is short for Wide Area Networks. A wide area network is a network that is used to connect different sites for a particular company.įor example, a company may have an office in Sydney, Melbourne and Brisbane but they cannot afford to run a cable between the different sites as it is too far away. Fully and partially meshed topology are usually discussed in the context of WAN networks. The next type of topology we will be looking at is the concept of fully meshed and partially meshed. This is one of the reasons why bus topology setup is less common in a network. The diagram below shows how if data is put on my PC1 then PC2 and PC3 will also see that data. One inherits characteristic of a bus network is that once data is put onto the cable all the other devices can see that data. For example, you may have a bus, star or ring topology.Ī bus topology is a network setup in which each computer and network device are connected to a single cable. Within the physical topology, there can be some difference between each physical diagram. This is because it allows you to see what is connected and allows for greater assistance when troubleshooting. When troubleshooting a network, it is recommended that you take a look at the physical topology diagram. For the laptop to reach the server it must go through several routers and switches before it reaches its intended location. The laptop which is known as the end device may want to connect to a Google server which may be located in the USA. The above image shows a physical topology example. However, both devices must have a serial connection. A serial connection can also be used to transfer data across from two devices. The solid black line represents that the devices are connected using an Ethernet cable.Ī serial connection is expressed via the utilization of a lightning bolt as shown below. You should also take a look at the lines used to connect the network devices. The next network device is the router which is located at the top of the image. The rectangle in the centre of the image is a representation of what a switch would look like. The host devices are all connected to a device called a switch. However, most of them will be some sort of representation of what is shown above. The image may vary slightly from topology to topology. However, I wanted you to familiarise yourself with the different types of images associated with the devices on a network.įor example PCA, PCB, PCC, PCD are host devices. It shows layer 2 switching which will not be covered in this post. If you guys think Python can do this, which Python? 2.The above image is an example of a network topology diagram. I'm reasonably good with Python but I am open to suggestion of other languages. I'm just trying to decide what to use and generally how to go about doing this. I've looked at PyQT, Graphviz, outputting to HTML etc. To get to the point I'm asking where I might start to do this. It is also crucial that the user would be able to able to capture their view as a still image, which I'd guess would be far more easily done in HTML. However I'd like to get basics down first, so thinking that I should start with drawing the diagram in HTML and have hyper-links for nodes allowing the user to move around and deeper into the diagram using a browser. Allowing you to then click and drag around the map. I'd like this process to be as smooth as possible, allowing you to zoom in using the scroll wheel in a location of the diagram and it expands as you do so. I want it to be interactive, in a sense that at the highest level only network range communication can be seen, and as you move deeper into the diagram you begin to see individual nodes (switches, routers, firewalls, hosts, servers, etc) all linked together. I want to draw a diagram based on this information in the style a network diagram. These illustrations are essential for several reasons, but most importantly, for their ability to visualize physical and logical layouts so administrators can identify connections between devices when troubleshooting. I've got masses of network information held in a SQLite database. A network topology diagram is a visual representation and interactive tool for network architecture and design.
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