Which Option Correctly Describes A Switching Method?
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Which option correctly describes a switching method?
Answer: The store and forward switching work by doing the error checking on the incoming frames right after the whole frames are received on the ingress port. The switches with this method are allowed to be flexible to assist any kind of mix of ethernet speed.it starts the forward process when the destinated MAC address of the coming frames is perused and the engross port is set up.
The switching method defines the initiating of the forwarding level of internal frame processing. Three types of methods are available for switching, which are defined in the following section:
Store-and-forward method:
In this process the switch waits for the bits receival, when all the frames are received it can check Whether the frames have an error or not. If there is no error then the switch forwards them to the selected ports. If the error detects then the frames will discard.
Cut-through switching method:
When the forward port is set up then the switch begins the third phase in this technique. The destined MAC address of the packets is only needed by the frames, which are stored by the ethernet frames in a third field. as the MAC address is present very early in the ethernet frame, the switch work moving the received frames even before all the frames are received.
Fragment-free method:
Right after the forward port, the switch has to wait for the 64 bytes of the packets which are received. These are the minimum size of the Ethernet frames. The frames smaller than this size are called the runt frames, which is the corrupt frame.