15 usually but it can change over time
two
The topology described is known as a mesh topology. In a mesh topology, every workstation and peripheral is interconnected, allowing for direct communication between all devices. This setup provides high redundancy and reliability, as the failure of one connection does not affect the entire network. However, it can be costly and complex to implement due to the number of connections required.
Only the formula required is for mesh topology. i.e. The number of connections in a full mesh = n(n - 1) / 2.
this topology is very economical like bus topology because it doesn't required a number of I\O ports to connect node and doesn't required several kinds of multiplexing devices to manage.
In a mesh topology, the total number of links (connections) can be calculated using the formula ( L = \frac{N(N-1)}{2} ), where ( N ) is the number of devices (nodes) in the network. This formula accounts for the fact that each device can connect directly to every other device, resulting in a fully connected network. In a partial mesh topology, the number of links will be less than the maximum, depending on which devices are interconnected.
this topology is very economical like bus topology because it doesn't required a number of I\O ports to connect node and doesn't required several kinds of multiplexing devices to manage.
In a bus topology, the bandwidth is shared among all devices connected to the bus, leading to a limitation in data transmission rates as multiple devices communicate simultaneously. This can result in network congestion, particularly as the number of connected devices increases. Additionally, the overall bandwidth is determined by the capacity of the bus itself, which can be a bottleneck if not appropriately managed. Consequently, performance can degrade with heavy network traffic.
A star topology has a central hub with other devices each connected to the hub but not to each other - for one device to communicate to another, they have to use the hub. With a bus topology all the devices are connected to the same bus - there is no hub. Each topology has advantages and disadvantages; the speed of a star network is limited by the hub; a telephone exchange is an example of a star network and there is a built-in limit to the number of devices that can be connected and there's no way to increase it other than to replace the hub with a bigger one. However, the devices (telephones in our example) can be dumb - all the intelligence is in the hub; it manages the calls and importantly, for commercial exchanges, calculates the bills. For bus networks, devices have to be smarter but can do much more as they can grab the whole bus.
The mesh topology is generally considered the most expensive to implement due to its requirement for a dedicated point-to-point link between every pair of devices in the network. This results in a significant increase in cabling and installation costs, especially as the number of devices grows. Additionally, the complexity of managing and configuring the network increases, further contributing to the overall expense.
star network + guide to networks pg 105 Whoever answered that is a fool. Edition number? Yeah, guess you forgot. I have edition 5 here and that answer is not on page 105 or close to it either.
It consists of a number of hubs that form geographical cells for connections. Users and devices can roam from cell to cell in the network. It uses point-to-point and multipoint connections.
- It consists of a number of hubs that form geographical cells for connections. - It uses point-to-point and multipoint connections. - Users and devices can roam from cell to cell in the network.