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Define Cut Through Switching Mode? ambrose 18-April-2009 02:00:17 AMComments this link give you details From:http://encyclopedia2.thefreedictionary.com/cut-through+switching Posted by waqasahmad For more detail follow the link http://encyclopedia2.thefreedictionary.com/cut-through+switching Posted by HamidAliKhan Cut Through is the fastest switching mode. The switch analyzes the first six bytes after the preamble of the frame to make its forwarding decision. Those six bytes are the destination MAC address, which, if you think about it, is the minimum amount of information a switch has to look at to switch efficiently. After the forwarding decision has been made, the switch can begin to send the frame out the appropriate port(s), even if the rest of the frame is still arriving at the inbound port. The chief advantage of Cut-Through switching is speed; no time is spent running the CRC, and the frame is forwarded as fast as possible. The disadvantage is clearly that bad frames will be switched along with the good. Because the CRC/FCS is not being checked, we might be propagating bad frames. This would be a bad thing in a busy network, so some vendors support a mechanism in which the CRCs are still checked but no action is taken until the count of bad CRCs reaches a threshold that causes the switch to change to Store-and-Forward mode. Posted by campbell123 The application of wormhole routing to packets in a packet switching system so that forwarding of a packet starts as soon as its destination is known, before the whole packet has arrived. From:http://encyclopedia2.thefreedictionary.com/cut-through+switching Posted by sagitraz |
Posted: 18-April-2009 03:44:41 AM By: sagitraz The application of wormhole routing to packets in a packet switching system so that forwarding of a packet starts as soon as its destination is known, before the whole packet has arrived. From:http://encyclopedia2.thefreedictionary.com/cut-through+switching | |
Posted: 20-April-2009 01:27:57 AM By: campbell123 Cut Through is the fastest switching mode. The switch analyzes the first six bytes after the preamble of the frame to make its forwarding decision. Those six bytes are the destination MAC address, which, if you think about it, is the minimum amount of information a switch has to look at to switch efficiently. After the forwarding decision has been made, the switch can begin to send the frame out the appropriate port(s), even if the rest of the frame is still arriving at the inbound port. The chief advantage of Cut-Through switching is speed; no time is spent running the CRC, and the frame is forwarded as fast as possible. The disadvantage is clearly that bad frames will be switched along with the good. Because the CRC/FCS is not being checked, we might be propagating bad frames. This would be a bad thing in a busy network, so some vendors support a mechanism in which the CRCs are still checked but no action is taken until the count of bad CRCs reaches a threshold that causes the switch to change to Store-and-Forward mode. | |
Posted: 21-April-2009 03:23:26 AM By: HamidAliKhan For more detail follow the link http://encyclopedia2.thefreedictionary.com/cut-through+switching | |
Posted: 27-April-2009 02:04:26 AM By: waqasahmad this link give you details From:http://encyclopedia2.thefreedictionary.com/cut-through+switching |