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					Difference between Router ,Switch,Hub?

Router

   -   These routers receive TCP/IP packets, look inside each packet to
       identify the source and target IP addresses, then forward these packets
       as needed to ensure the data reaches its final destination.
   - Routers are designed to join multiple area networks like LAN and WAN.
   - routers serve as intermediate destinations for network traffic.
   - With a router, all home computers connect to the router equally, and it
       performs the equivalent gateway functions.
   - Broadband routers contain several features like DHCP server and proxy
       support. Most of these routers also offer integrated firewalls. Wired
       Ethernet broadband routers typically incorporate a built-in Ethernet
       switch. These routers allow several hubs or switches to be connected to
       them, as a means to expand the local network to accommodate more
       Ethernet devices.
   - Wi-Fi wireless routers incorporate a built in access point that is roughly
       equivalent to a wires switch.
Router is known as layer3 device and works alos on hardware
technology and map the mac addresses. it basically connects
two different networks or netids to each other.it works with
routing table.
   -



Switch
   - Switch can not capable to join multiple networks or sharing an internet
       connection
   - A home network with only switches must designate one computer as the
       gateway to the Internet, and that device must possess two network
       adapters for sharing, one for the home LAN and one for the Internet
       WAN.
   - In small network switch technically exist only for wired networks.

Switch are basically layer2 device and it works on Hardware
technology with map the mac addresses and it works with
switch table.

   -


Hub
   -   Hub can not capable to join multiple networks or sharing an internet
       connection
   -    A home network with only hubs must designate one computer as the
       gateway to the Internet, and that device must possess two network
       adapters for sharing, one for the home LAN and one for the Internet
       WAN.
   -   In small network hubs technically exist only for wired networks.




1] Switch is separate collision domain. single broad cast
domain. this breakup collision domain.
  Router breakup broadcast domain.

2] Switch hardware oriented. L2 devices. packet transferred
through mac address
  Router Software oriented. L3 devices. packet transferred
through ip address

3] Switch connected between same network
  Router connected between different network.




Reference:

http://www.allinterview.com/showanswers/73888.html
http://www.google.com/search?client=firefox-a&rls=org.mozilla%3Aen-
US%3Aofficial&channel=s&hl=en&source=hp&q=difference+between+switch+and
+router&btnG=Google+Search

				
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Description: The Internet protocol suite is the set of communications protocols used for the Internet and other similar networks. It is commonly known as TCP/IP, because of its most important protocols: Transmission Control Protocol (TCP) and Internet Protocol (IP), which were the first networking protocols defined in this standard. Modern IP networking represents a synthesis of several developments that began to evolve in the 1960s and 1970s, namely the precursors of the Internet and local area networks, which emerged during the 1980s, together with the advent of the World Wide Web in the early 1990s