Wednesday, August 22, 2018

What are the types of Computer Topology?

DIFFERENT TYPES OF COMPUTER TOPOLOGY:


  • LINEAR BUS TOPOLOGY is a type of network topology in which each device is connected one after the other in a sequential chain. In this case, the bus is the network connection between the devices, and if any link in the network chain is severed, all network transmission is halted. It works well for small networks because it is simple to set up and utilizes shorter cables since each device is connected to the next. It is a poor solution for larger networks, however since the entire network relies on each connection, and network speed is reduced as more devices are added.





  • STAR TOPOLOGY  is one of the most common network setups. In this configuration, everynode connects to a central network device, like a hub, switch, or computer. The central network device acts as a server and the peripheral devices act as clients. Depending on the type ofnetwork card used in each computer of the star topology, a coaxial cable or a RJ-45 network cable is used to connect computers together.






  • RING TOPOLOGY is a network configuration in which device connections create a circular data path. Each networked device is connected to two others, like points on a circle.
In a ring network, packets of data travel from one device to the next until they reach their destination. Most ring topologies allow packets to travel only in one direction, called a unidirectional ring network. Others permit data to move in either direction, called bidirectional.







  • MESH TOPOLOGY,  is a local network topology in which the infrastructure nodes connect directly, dynamically and non-hierarchically to as many other nodes as possible and cooperate with one another to efficiently route data from/to clients. This lack of dependency on one node allows for every node to participate in the relay of information. Mesh networks dynamically self-organize and self-configure, which can reduce installation overhead. The ability to self-configure enables dynamic distribution of workloads, particularly in the event that a few nodes should fail. This in turn contributes to fault-tolerance and reduced maintenance costs.

In a partially connected mesh topology, at least two of the computers in the network have connections to multiple other computers in that network. It is an inexpensive way to implement redundancy in a network. In the event that one of the primary computers or connections in the network fails, the rest of the network continues to operate normally.

In a full mesh topology, every computer in the network has a connection to each of the other computers in that network. The number of connections in this network can be calculated using the following formula (n is the number of computers in the network): n(n-1)/2






  • HYBRID TOPOLOGY, is a combine of two or more topologies in such a way that the resulting network does not exhibit one of the standard topologies
Is a type of network topology that uses two or more differing network topologies. These topologies include a mix of bus topology,mesh topology, ring topology, star topology, and tree topology.


  SOURCE:
https://www.computerhope.com/jargon/h/hybrtopo.html
https://en.wikipedia.org/wiki/Network_topology

Sunday, August 12, 2018

What are the types of computer network?

DIFFERENT TYPES OF COMPUTER NETWORK:

A Personal Area Network (PAN) is a computer network for interconnecting devices centered on an individual person's workspace. A PAN provides data transmission amongst devices such as computers, smartphonestablets and personal digital assistants. PAN's can be used for communication amongst the personal devices themselves, or for connecting to a higher level network and the Internet where one master device takes up the role as gateway. A PAN may be carried over wired computer buses. 


A Local Area Network (LAN) is a computer network that interconnects computers within a limited area such as a residence, school, laboratory, university campus or office building. By contrast, a wide area network (WAN) not only covers a larger geographic distance, but also generally involves leased telecommunication circuits.


A Metropolitan Area Network (MAN) is a computer network that interconnects users with computer resources in a geographic area or region larger than that covered by even a large local area network (LAN) but smaller than the area covered by a wide area network (WAN). The term MAN is applied to the interconnection of networks in a city into a single larger network which may then also offer efficient connection to a wide area network.It is also used to mean the interconnection of several local area networks in a metropolitan area through the use of point-to-point connections between them.

A Wide Area Network (WAN) is a telecommunications network or computer network that extends over a large geographical distance/place. Wide area networks are often established with leased telecommunication circuits.
Business, education and government entities use wide area networks to relay data to staff, students, clients, buyers, and suppliers from various locations across the world. In essence, this mode of telecommunication allows a business to effectively carry out its daily function regardless of location. The Internet may be considered a WAN.