HUB, SWITCH, ROUTER and BRIDGE

HUB
 
Hub Interface Atar computers, all types of communication can only be passed by the hub. hub is used for a simple form of network (eg only for connecting multiple computers in a local IP group) when there is an incoming packet to one port on the hub, it will be copied into another port on the same hub and all computers which are connected at the hub The same can read the package. Currently, the hub is a lot of abandoned and replaced with a switch. The reason for this replacement is usually because the hub has a data transfer speed is slower than switches. Hubs and switches have a data transfer rate up to 100 Mbps and even switch has been developed up to 1 Gbps.

Switch

Switch A device that filters / filter and pass (allow to pass) package that is on a LAN. switcher working on the data link layer (layer 2) and sometimes at the Network Layer (layer 3) based on the OSI Layer Model. so it can work for any protocol packets. LANs that use switches to communicate on the network then called a Switched Ethernet LAN or in the physical network called a Switched Ethernet LAN.








 


Router

Router Tool is responsible for delivering data packets in the network. router can be used if it is connected with at least two different networks so that the settings require a router.Router is on the gateway, a place where two or more LAN networks to be connected. Routers use HEADERS introduction and a list of tables (Forwarding Table) to determine the best position to deliver a packet network and also use protocols such as ICMP, HTTP to communicate with other LAN with the best configuration for the path between any two hosts.


Understanding Bridge
The definition of a bridge is bekarja on the data link layer in OSI. bridge partners are the tools used on a network that serves to separate an extensive network into smaller segments. reading bridge MAC address (media access control0 of each packet of data received will then learn dridging table to decide what to do next bridge on the data packet, whether forwarded or ignored. if the switch should be entitled on their own collision domains on each port, as well as the bridge has a collision domain ttetepi he also can split from a large collision domain into smaller, easy bridge will only pass data packets between segments - segment if it is necessary only segmentThere are three types of network bridges which are common:Local Bridge: a bridge that connects the local network segments.Remote Bridge: can be used to make a connection (link) between the LAN to create a Wide Area Network.Wireless Bridge: a bridge that can incorporate a wired LAN and wireless LAN networks.

By : http://view-options.blogspot.com/2011/04/hubswitchrouter-dan-bridge.html