WHAT IS ROUTER, SWITCH AND HUB?

ROUTER

-       is a networking device

-       located at gateway

-       forward data packets between computer networks

-       usually using LAN,WAN and ISP network

-       connected to two or more data lines from different networks.

-       Send information by looking packet address

-       Using routing table or routing policy

-       Data packet forwarded from one router to another through network

SWITCH

-       Also network device

-       Device that using to filter packet

-       Using OSI Reference model (layer 2 and sometimes layer 3)

-       Support any packet protocol

-       Forward packet using Lan segment

HUB

-       used to connect segments of a LAN.

-       Have multiple ports

-       When packet arrive to the port it will copy to other port

-       All segment in LAN can see all packet

refer to: http://en.wikipedia.org/wiki/Router_(computing)

              http://www.webopedia.com/DidYouKnow/Hardware_Software/router_switch_hub.asp