HVTA [cnttbachkhoa]

To view the CCNA exam and earn this important certification, you learned after about a change  inside and outside. If you learn all the basic theory of change, make  sure to spend time with him one of three modes of the changeover can use  the Cisco router.

Store and forward is exactly what it sounds. The whole picture will be  stored is encrypted before transmission. This mode allows the greatest  amount of error checking, since a CRC (Cyclic Redundancy Check) is  against the frame, before they transferred. If the frame contains an  error, it is discarded. If there is no problem with the frame, the frame  is then forwarded to their proper destination.

Although the storage and the front error checking is performed, the  delay in the processing context for this error checking results in a  higher latency than other methods is done you are reading. The latency  can be different, since all images have the same size.

Cut-transmitted copies before switching to the destination MAC  address in memory beginning at the frame. Since the frame when the  destination MAC is transmitted to read, there’s less latency and storage  forward. The disadvantage is that there is no error checking.

There is a middle fragment switching. Only part of the image is  copied into memory before it is sent, but the first 64 bytes of the  frame, not only the destination MAC address. (Why? Because if there is a  problem with the framework, it is very likely in the first 64 bytes.)  There is an error checking a bit more cut-through, but do not have the  latency store-and-Forward.

Note that the latency of the two cut-through and no fragment is  fixed, and watch these methods always, the six or 64 bytes. Latency  store-and-forward depends on the size of the frame.
Learn the similarities and differences between these modes is an often  overlooked CCNA studies. Spend some time studying this important  question CCNA – you will not regret it