Repeater:
-A repeater is an electronic device that receives a signal and retransmits it at a higher level or higher power, or onto the other side of an obstruction, so that the signal can cover longer distances.
-Repeaters work at the OSI's Physical layer.
-Repeaters require a small amount of time to regenerate the signal. This can cause a propagation delay which can affect network communication when there are several repeaters in a row.
-
![](http://www.tutorialsweb.com/images/networking-images/repeater.jpg)
Bridge:
-A network bridge is a network device that connects multiple network segments.
-A bridge reads the outermost section of data on the data packet, to tell where the message is going.
- It reduces the traffic on other network segments, since it does not send all packets.
-Bridges can be programmed to reject packets from particular networks.
- Bridging occurs at the data link layer of the OSI model.
![](http://www.igcseict.info/theory/4/hware/files/stacks_image_7406_1.png)
Router:
-A router is used to route data packets between two networks.
-Routers work at the Network layer of the OSI model meaning that the Routers can switc h and route packets across multiple networks.
-Routers can share status and routing information with one another and use this information to bypass slow or malfunctioning connections.
-It reads the information in each packet to tell where it is going.
- If it is destined for an immediate network it has access to, it will strip the outer packet, readdress the packet to the proper ethernet address, and transmit it on that network.
-If it is destined for another network and must be sent to another router, it will re-package the outer packet to be received by the next router and send it to the next router.
![](http://ciscostuffs.com/wp-content/uploads/2014/01/Router.jpg)
Gateway:
-A repeater is an electronic device that receives a signal and retransmits it at a higher level or higher power, or onto the other side of an obstruction, so that the signal can cover longer distances.
-Repeaters work at the OSI's Physical layer.
-Repeaters require a small amount of time to regenerate the signal. This can cause a propagation delay which can affect network communication when there are several repeaters in a row.
-
![](http://www.tutorialsweb.com/images/networking-images/repeater.jpg)
Bridge:
-A network bridge is a network device that connects multiple network segments.
-A bridge reads the outermost section of data on the data packet, to tell where the message is going.
- It reduces the traffic on other network segments, since it does not send all packets.
-Bridges can be programmed to reject packets from particular networks.
- Bridging occurs at the data link layer of the OSI model.
![](http://www.igcseict.info/theory/4/hware/files/stacks_image_7406_1.png)
Router:
-A router is used to route data packets between two networks.
-Routers work at the Network layer of the OSI model meaning that the Routers can switc h and route packets across multiple networks.
-Routers can share status and routing information with one another and use this information to bypass slow or malfunctioning connections.
-It reads the information in each packet to tell where it is going.
- If it is destined for an immediate network it has access to, it will strip the outer packet, readdress the packet to the proper ethernet address, and transmit it on that network.
-If it is destined for another network and must be sent to another router, it will re-package the outer packet to be received by the next router and send it to the next router.
![](http://ciscostuffs.com/wp-content/uploads/2014/01/Router.jpg)
Gateway:
-Gateways make communication possible between different architectures and environments.
-They repackage and convert data going from one environment to another so that each environment can understand the other's environment data.
-A gateway repackages information to match the requirements of the destination system.
-Gateways can change the format of a message so that it will conform to the application program at the receiving end of the transfer.
No comments:
Post a Comment