## What are a network topology???

A network topology is a collection of nodes that are connected to each other with some common point, such as a router. It is the basic building block of networks and consists of IP networks are composed of two primary elements: routers and switches. The router is a device that connects to a network by determining the route from one data center to another. The switch is the device that connects a network together. The switching process consists of forwarding data, routing packets and detecting errors in them. A network topology is the physical and logical arrangement of nodes and connections in a network. Nodes usually include devices such as switches, routers and software with switch and router features. Network topologies are often represented as a graph. A network topology describes the relationship between the computers on a network. A simple network topology is a chain of computers that are connected to each other by a cable.

Network topology diagrams is a diagramming technique for representation of network topology. Used in teaching or introducing network classes.

### Why is network topology important?

Network topology plays a major role in how a network functions. Namely, the topology has a direct effect on network functionality. Collocation happens when a network resource is co-located or located near to a node where there are other nodes that would be good candidates for data transfer.

A well-defined network topology makes it easier for network admins to locate faults, troubleshoot issues and to allocate network resources. Diagrams are an important reference point in helping to diagnose network issues, as they can represent physical and logical layouts.

### What are the types of network topologies?

Network topologies are categorized as either a physical network topology or logical network topology. The physical topology of a network is the physical layout of nodes and connections. Connections are groups of lines in a diagram, such as Ethernet lines and the actual barcode to which they point. Logical network topologies define how a network is set up, including which nodes connect and how, as well as the pattern of data transfers.

There are several types of topologies. For example, physical topologies include the following:

• Bus network. In the bus network topology, every cable is connected in series along a single cable. This arrangement was originally introduced in the 1960s and later been widely adopted by telecom operators to expand their potential customer base. Description – Article titled “How AI Writers Are Better Than Copywriters” published on Buzzfeed Business. Example- A user could either use a ticketing platform that tracks

• Star network. The star network topology resembles a network where all nodes are connected only through the hub. In particular, home and office Ethernet networks have a physical connection with Ethernet switches, while cellular telephony networks include switches embedded in the subscriber base.

• Ring network. The ring topology in the case of micro-update is one of the most common, unidirectional networks. This configuration is quite good for data transmission, because the rate increases with the number of hops in total.These bidirectional ring networks are more resilient than bus networks since traffic can reach a node by moving in either direction. Metro networks based on Synchronous Optical Network technology are the primary example of ring networks.

• Mesh network. Mesh network topology: A mesh (inspired by a devious and underappreciated version of 4-dimensional graph theory, but that takes seriously the interconnectedness of existing strands) forms a network that can be traversed in multiple directions. There may be one or more intersecting paths, where each end has one end and two equivalent points (so it is not possibleA network is considered to be fully meshed if all nodes are directly connected to all other nodes and partially meshed if only some nodes have multiple connections to others. Meshing multiple paths increases resiliency but also increases cost. However, more space is needed for dedicated links.

• Tree network. The tree network topology consists of one root node, and all other nodes are connected in a hierarchy. The topology itself is connected in a star configuration. Many larger Ethernet switch networks, including data center networks, are configured as trees.

• Hybrid network. The hybrid network topology is any combination of two or more topologies. Hybrid topologies typically provide exceptional flexibility, as they can accommodate a number of setups. For example, different departments in the same organization may opt for personalized network topologies that are more adaptable to their network needs.

A logical topology for a network refers to the relationship between nodes and logical connections — defining how data should transfer.

Add and drop multiplexers peek peek at the edges of the optical path and create optical paths dynamically, speeding up traffic even in congested networks. Networks based on virtual circuits or tunnels have a physical topology based on the real connection medium — fiber, for example — and a logical topology based on the circuits and tunnels.

The logical topology is the complete and correct connection between any two hosts (devices). It ‘s not fully meshed since every access point is prone to failure. An example of this problem is a LAN with unsecured internet. Most firewalls and other network components block incoming connections to an IP address or a specific port and prevent connecting to potentially malicious machines. Furthermore, shielding networks (using the Internet Protocol) from many, unsolicited connections makes it much harder for users of any sort to “take over” systems in this way.

As an example, logical bus and logical ring topologies can be used to define data transmission flows. A logical bus topology features nodes that broadcast data to the entire network. Other nodes on the network check to see if the data is meant for them. Logical ring topology only allows one node to transfer data at a time.

## How do you diagram a network topology?

Diagrams of the network topology should be made before constructing a network. This way, network admins know what components constitute the network and how they interact.

This process should start with a list of all the devices in the network. This could, for example, include routers, firewalls and servers. The type of network topology should then be chosen. Once the list of devices is put together and a topology has been chosen, the diagram can be sketched out. Devices should be placed in areas that would best make sense, considering data flows. Next, lines are drawn from network devices. These lines are the connections the network nodes make. Stray away from having too many lines cross over each other and strive to make the diagram clear and easy to read. Scalability and future modifications should also be kept in mind when creating the diagram.

After a sketch showing a rough general input is constructed, diagram software can be used to help map everything out. The software used may include a network diagram template to follow. The network nodes should be named, and lines can be color-coded to further help make the diagram more understandable and clear.

## What are examples of network topology tools and software?

There are many network topology tools available, including those that can be categorized as configuration and management tools, network performance software and network mapping software.

For instance, network configuration software helps configure networks, while also automating repetitive tasks. These tools are often used to configure complicated network topologies and can auto detect network nodes and highlight apparent vulnerabilities.

Network performance monitoring tools keep track of and notify users as to issues with the network. Visualizing how a network is performing helps you better understand where the problems are and what needs to be fixed.After setting baseline performance settings, users can track, locate and troubleshoot issues.

These reports and software can easily help you create effective network diagrams. The depth and complexity of the networks we take for granted (mobile, social, etc.) aren’t well understood and shown in these sequences often. They make this complicated matter easier to understand and manage:

• Edraw

• Lucidchart

• ManageEngine OpManager network mapping

• Microsoft Visio

• NetTerrain Logical

• SolarWinds Network Topology Mapper

• Spiceworks network mapping

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