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.
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.
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.
Computer network topologies refer to the physical or logical layout of devices and connections in a network. They define how nodes, such as computers, servers, or other devices, are arranged and how data flows between them. Common network topologies include bus, star, ring, mesh, tree, and hybrid configurations. In a bus topology, devices connect to a single central cable where data travels to each device. Star topologies use a central hub or switch to connect all devices, managing data distribution centrally. Ring topologies form a closed loop where data passes sequentially between connected devices. Mesh topologies offer redundancy with multiple interconnections, enhancing reliability. Tree topologies combine bus and star structures, while hybrid topologies integrate different types for flexibility. Each topology suits different network needs based on factors like scalability, fault tolerance, and performance requirements.
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.
only one sentence is enough, Network can have any shape according your requirement