Network?

Hey ! Welcome again to my blog :))

So,today i would like to talk about network.

Since i was study about network in my second semester so i would like to share something that i know about network.

Let's start !

NETWORK  is a collection of computers and devices connected together via transmission media and communication devices .

NETWORK ARCHITECTURE

Design of computers, devices and media in a network . 

Client/Server

A client/server network is a network in which the shared files and applications are stored in the server but network users (clients) can still store files on their individual PCs. A server is a computer that shares information and resources with other computers on a network. A client is a computer which requests services or files from a server computer.

 

http://www.dailywebsolutions.com/what-is-client-server-architecture

Peer-to-Peer

Peer-to-peer network is a network with all the nodes acting as both servers and clients. A PC can access files located on another PC and can also provide files to other PCs. With peer-to-peer network, no server is needed; each computer in the network is called a peer. All computers in the peer-to-peer network has equal responsibilities and capabilities to use the resources available on the network.

http://www.conniq.com/Networking_Architecture.htm

                                                  NETWORK TOPOLOGY

A network topology refers to the layout of the computers and devices in a communications network.

3 types of network topology :-

Ring topology 

A network topology that is set up in a circular fashion in which data travels around the ring in one direction and each device on the ring acts as a repeater to keep the signal strong as it travels. Each device incorporates a receiver for the incoming signal and a transmitter to send the data on to the next device in the ring. The network is dependent on the ability of the signal to travel around the ring. When a device sends data, it must travel through each device on the ring until it reaches its destination. Every node is a critical link.In a ring topology, there is no server computer present; all nodes work as a server and repeat the signal. The disadvantage of this topology is that if one node stops working, the entire network is affected or stops working.

http://www.slideshare.net/siddiqueibrahim37/network-topologyppt

Star topology

In local area networks with a star topology, each network host is connected to a central hub with a point-to-point connection. In Star topology every node (computer workstation or any other peripheral) is connected to a central node called hub or switch. The switch is the server and the peripherals are the clients. The network does not necessarily have to resemble a star to be classified as a star network, but all of the nodes on the network must be connected to one central device. All traffic that traverses the network passes through the central hub. The hub acts as a signal repeater. The star topology is considered the easiest topology to design and implement. An advantage of the star topology is the simplicity of adding additional nodes. The primary disadvantage of the star topology is that the hub represents a single point of failure.

http://webpage.pace.edu/ms16182p/networking/star.html

Bus topology 

In local area networks where bus topology is used, each node is connected to a single cable. Each computer or server is connected to the single bus cable. A signal from the source travels in both directions to all machines connected on the bus cable until it finds the intended recipient. If the machine address does not match the intended address for the data, the machine ignores the data. Alternatively, if the data matches the machine address, the data is accepted. Because the bus topology consists of only one wire, it is rather inexpensive to implement when compared to other topologies. However, the low cost of implementing the technology is offset by the high cost of managing the network. Additionally, because only one cable is utilized, it can be the single point of failure.

http://gniitstudents.blogspot.my/2015/08/what-is-network-topology.html