Star Topology

Star: In Star Topology, each device has a dedicated point-to-link dedicated to a central controller called a hub or switch. This controller acts as an exchange, which relay data from one device to another. Unlike the Mesh Topology, two devices can not communicate directly. All communications are done through the controller.

Star Topology

Advantages

→Since each device requires only one link and an I / O port for the controller, it is less expensive.
→It is easy to establish and reconnect the star topology.
→It is strong because even if one link fails, the other remains active.
→Fault detection and separation is also easy.

Disadvantages

→The performance of the network depends entirely on the hub. If the hub fails, the entire network stops. Since all communications are done through the hub, the speed of communication depends on the number of devices connected to the hub.

Mesh Topology

Mesh: It is also called fully interconnected topology. In this topology, every device has a point-to-point link for every other device in the network. Thus, for n devices, the total n (n-1) / 2 links will be. It allows direct communication between any two devices. This topology provides the highest degree of tolerance.

Fully Connected Mesh Topology

Advantages

→Traffic problems end because there is a dedicated link between any two devices.
→Aries topology is strong because even if a link is useless, the network does not crash.
→Point-to-point links make identities of fault and fault separation easier.
→Another advantage is privacy. Since the data is sent with a dedicated link, only the desired recipient receives it.
→This topology provides the highest reliability and security.

Disadvantages

→The main disadvantages are the number of cabling required to interconnect devices and the number of required I / O ports on each device.
→It is difficult to establish and reconnect new equipment.
→Mesh topology is expensive due to the large number of hardware requirements (cable, port).

Physical Topology

Physical Topology

Physical Topology: This refers to the manner in which the network is physically determined, it is geometric representation of all the links and devices in the network. Five basic physical topologies are used in the network.

1. Bus Topology
2. Star Topology
3. Ring Topology
4. Mesh Topology
5. Cellular Topology

These topologies can be added further to create the following topology:

1. tree Topology
2. Hybrid Topology