Routers,+switches,+hubs

= **Routers, switches, hubs** =
 * Routers ** - A router is a device that forwards data packets between computer networks, creating an overlay internetwork. A router is connected to two or more data lines from different networks.


 * Switches ** - A network switch or switching hub is a computer networking device that connects network segments.


 * Hubs ** - An Ethernet hub, active hub, network hub, repeater hub or hub is a device for connecting multiple Ethernet devices together and making them act as a single network segment.

A hub works at the physical layer (layer 1) of the OSI model. The device is a form of multiport repeater. Repeater hubs also participate in collision detection, forwarding a jam signal to all ports if it detects a collision.

A network hub is an unsophisticated device in contrast with, for example, a switch. A hub does not scrutinize or manage any of the traffic that comes through it: any packet towards the inside any port is rebroadcast on all other ports. So in practical terms, if you have broadband and you want a connection to the internet and you can have more than one device connected via the Ethernet ports so you can have more than one laptop connected to the internet via the hub.   = =