In Which Situation We Prefer Star Topology Over Ring To
Pology
Answers
Explanation:
Difference Between Star and Ring Topology
March 8, 2018 Leave a Comment
Star topology vs Ring topologyA topology is a relationship exist between the links and linking devices (nodes) to each other which is represented by a geometric representation. Star and Ring topology are the types of network topologies. The crucial difference between star and ring topology is that the star topology is suitable for a primary-secondary type of connection whereas ring topology is more convenient for the peer-to-peer connection.
The link is shared equally in the peer-to-peer connection. Inversely, in a primary-secondary relationship one device is used to control traffic and other devices must transmit the signal through it.
Content: Star Topology Vs Ring Topology
Comparison Chart
Definition
Key Differences
Conclusion
Comparison Chart
BASIS FOR COMPARISON STAR TOPOLOGY RING TOPOLOGY
Architecture structure
Peripheral nodes are linked to the central device known as a hub.
Every node has two branches connected to a node either side of it.
Amount of cabling required
Larger
Less as compared to star topology
Point of failure
Hub
Every node in the ring
Data traversal
All data passes through the central network connection.
Data moves in only one direction around the ring till it arrives the destination.
Network expansion
A new cable is plugged in from the new node to the hub.
In order to add a new node, a connection must be broken which turns down the network.
Fault isolation
Easy
Difficult
Troubleshooting
The other nodes are affected only in the case of a hub failure. When a node goes down the information continues to transfer till the damaged node.
Cost
High
Low
Definition of Star Topology
Star Topology is the network architecture in which each device has a dedicated point-to-point link only to the central controller known as a hub. There is no direct link exists among the devices. It is dissimilar to mesh topology which allows direct traffic between the devices. In Star topology, the controller plays an important role and act as a mediator. When a device wants to send data to another, it first sends data to the controller which then relays the data to other connected devices.
Star topology needs only one link and I/O port to connect a device to another. That is the reason it is easy to install and reconfigure. The addition, deletion, replacement of the devices involves only one connection that is between that device and the hub. The cabling requirements are less in the star topology, but it is greater when we compare it with other topologies such as tree, ring and bus.
This topology is robust where even if the link fails, only that link is influenced and the other links remain active. It also makes fault identification and isolation easier. Hub observes link problems and bypasses faulty links.
Definition of Ring Topology
The Ring Topology connects each device with dedicated point-to-point line configuration to other two adjacent devices, and the first device connects to the last device. It passes a signal in only one direction from one device to other until it reaches the device sent the signal. A repeater is installed in each device in the ring. If a device receives a signal meant for another device, the device regenerates the bits and boosts the signal by using a repeater that is installed on each device and transfers them along. When the signal reaches the destination, the receiver sends back an acknowledgement to the sender.
Ring topology is easy to install and configure as each device is linked to its immediate neighbour. The addition, deletion and repositioning of a device just require changing only two connections. The only limitations are the traffic and media considerations, i.e., the maximum length of the ring and the number of devices.
The fault isolation in a ring can be simplified by using an alarm which alerts the network operator to the problem and its location. A signal is circulated continuously, if any device does not receive a signal within a specified time it can issue an alarm. Though, unidirectional nature of traffic can be disadvantageous for the network where even a single faulty cable can disable the entire network. This limitation can be overcome by employing a switch or a dual ring that is able to closing off the break