point-to-point
We know a database is one that stores data related to each other. A network database is just like network database only difference between them is, in network database records are connected by means of a link.
Data can be transferred in 3 different modes, these 3 modes are equally popular and used in common everyday situations. •Simplex If data can only be transferred in a single direction (one way) it is known as simplex. Television transmission is an example of Simplex transmission, here data can be transferred only to a television but no data can be transferred in the opposite direction. •Duplex When data maybe transferred in two directions simultaneously it is known as Duplex, a simple telephone conversation would be an example, while we usually don't talk simultaneously a telephone provides that 'duplex' functionality. •Half-Duplex In this mode of transmission as well, data maybe transmitted in both directions, however it cannot be done simultaneously. A Walkie Talkie would be an example of this mode of transmission. The different modes are implemented based on their requirements, for example in Simplex transmission, two way transmission is not required in television transmission thus Simplex is used.
Facebook is the only formal communication site.
It means to be able to go in only one direction.
With all network topologies there is the ability to send data either way, e.g. uploading and downloading.
Yes, in an active topology, each node participates in moving data through the network by actively sending, receiving, and processing data packets. This type of topology allows for a more dynamic and efficient flow of information compared to passive topologies where nodes only passively relay data.
Data flows in one direction only.
If a PC fails, only data transfer related to that PC is affected. Data transfer on entire network is affected by hub failure.
A star network uses a central server to route data between clients. The central server (or the switching hub) switches data around the network. Data flow between the server and the nodes will therefore be relatively low. A typical star network are mainframe computers. Star topology, also known as star network, is a computer network topology. It is a common network setup where the computers and other devices on the network are connected to a central or master computer, also known as the hub.
Here are some common types of network topologies: Bus Topology: In a bus topology, all devices are connected to a single central cable (the bus). Data travels along the bus and is received by all devices on the network. Each device has a unique address, and devices communicate directly with the bus. Star Topology: In a star topology, each device is connected directly to a central hub or switch. All data passes through the central hub, which manages and controls the flow of information between devices. If one device fails, it does not affect the rest of the network. Ring Topology: In a ring topology, each device is connected to two other devices, forming a closed loop or ring. Data travels in one direction around the ring. Devices act as repeaters to strengthen the signal as it passes through each device. Mesh Topology: In a mesh topology, every device is connected to every other device in the network. This creates multiple paths for data to travel, enhancing reliability and fault tolerance. Mesh networks can be full mesh (every device connected to every other device) or partial mesh (only some devices are interconnected). Tree Topology: Tree topology combines characteristics of star and bus topologies. Devices are arranged in a hierarchical structure, with multiple star networks connected to a central bus backbone. This allows for scalability and efficient data flow. Hybrid Topology: Hybrid topology combines two or more different types of topologies to form a larger network. For example, a network might combine elements of star and mesh topologies to create a more flexible and scalable network infrastructure. Each type of network topology has its advantages and disadvantages in terms of cost, scalability, reliability, and ease of management. The choice of topology depends on factors such as the size of the network, the type of applications used, and the level of redundancy and fault tolerance required.
The common network you have at home where a router controls all data and each computer is independent of the rest, dependent only on the router.
A token ring network uses a physical topology that is often depicted as a circular arrangement, where devices (nodes) are connected in a closed loop. Each node is connected to a central medium, and a token circulates around the ring, granting permission to transmit data to the node that holds it. This structure ensures that only one device can send data at a time, reducing collisions and improving network efficiency.
Star Topology is the most common type of network topology that is used in homes and offices. In the Star Topology there is a central connection point called the hub which is a computer hub or sometimes just a switch. In a Star Network the best advantage is when there is a failure in cable then only one computer might get affected and not the entire network.
point-to-point
1.The star topology use a hub in the center, only one hub. So all data exchange will go throught that one hub/router to reach another computer .If the hub is down, all the network is down too. In a mesh topology, each computer in the network has its own hub/or itself, so data exchange is done directly from one computer/or its hub, to another computer/or its hub, this is more secure since only one computer will be down in a case of problem with the interface(hub/itself[network card]) 2. Star topology has minimal line cost because only n-1 lines are required for connecting n nodes while mesh topology is the most expensive network from the point of view of link cost.If there are n nodes in a network. n(n-1)/2 links are required. Hence, cost of linking the system grows with square of the number of nodes. 3.In star topology communication is not very fast between any two nodes while in mesh topology communication is very fast between any two nodes.
Only the formula required is for mesh topology. i.e. The number of connections in a full mesh = n(n - 1) / 2.