Components Of a Network

The 6 Main Components Of a Network

Router

A router is a device that forwards data packets between computer networks, creating an overlay inter network. A router is connected to two or more data lines from different networks. When a data packet comes in one of the lines, the router reads the address information in the packet to determine its ultimate destination. Then, using information in its routing table or routing policy, it directs the packet to the next network on its journey. Routers perform the "traffic directing" functions on the internet. A data packet is typically forwarded from one router to another through the networks that constitute the inter network until it reaches its destination node.



A router is a device that forwards data packets between computer networks, creating an overlay inter network.


Switch

a network switch is a computer network device that links network segments or network devices. The term commonly refers to a multi-port network bridge that processes and routes data at the data link layer (layer 2) of the OSI model. Switches that additionally process data at the network layer (layer 3) and above are often called layer-3 switches or multi layer switches.

Switches exist for various types of networks including Fiber channels, asynchronous transfer mode, infiniband, Ethernet and others. The first Ethernet switch was introduced by Kalplan in 1990.



a network switch is a computer network device that links network segments or network devices.

Hub

An Ethernet hub, active hub, network hub, repeater hub, multi port or hub is a device for connecting multiple Ethernet devices together and making them act as a single network segment. It has multiple input/output (I/O) ports, in which a signal introduced at the input of any port appears at the output of every port except the original incoming. A hub works at the physical layer (layer 1) of the OSI model The device is a form of multi port repeater. Repeater hubs also participate in collision detection, forwarding a jam signal to all ports if it detects a collisions.

Server

In most common use, a server is a physical computer (a computer hardware system) dedicated to run one or more services (as a host), to serve the needs of the users of other computers on a network. Depending on the computing service that it offers it could be a data base server, file server, mail server, print server, web server, gaming server, or some other kind of server.



run one or more services (as a host)

Client

A client is a piece of computer hardware or software that accesses a service made available by a server. The server is often (but not always) on another computer system, in which case the client accesses the service by way of a network.



A client is a piece of computer hardware or software that accesses a service made available by a server.

Star network

a star network is the most common networks. the star network revolves around one hub/switch/server in the center, each computer or device is connected to it with it single feed so it will not get interrupted. this is a reliable network type because if one of the computers go down this does not mean that the whole network goes down, the only problem with this network is that if the central hub/switch/server goes down this means the whole thing will go down in till it is repaired.

Ring network

A ring network is a network topology in which each node connects to exactly two other nodes, forming a single continuous pathway for signals through each node - a ring. Data travels from node to node, with each node along the way handling every packet.

Bus network

A bus network topology is a network architecture in which a set of clients are connected via a shared communications line/cables, called a bus. There are several common instances of the bus architecture, including one in the mother board of most computers.