Assuming that switches turn published is empty, the host to send data to host 1 3,
MAC: host 1 FF FF FF FF FF - - - - 01;
The host 3 MAC: FF FF FF FF FF - - - - 03,


When switches received host 1 data, to the other host send radio (or switch), because the broadcast address is: FF FF FF FF FF - - - - FF, less all devices in the network will receive the data,
When the host 3 received after the broadcast, find is looking for his own, and send confirmation to the switch, and other host (or switch) after receiving the radio, found that is not to find their own, then discard the data,


So, please switch to send radio, target address has been changed to 6 F, the host 3 how that host 1 is sent to your own? How do you know the data and other equipment is not to own?

CodePudding user response:

1 to 3, not 1 q 3, but 1 is asked where 3 switch, query action isn't between hosts, but between the switches

CodePudding user response:

Switch MAC address table cannot find a destination address, the operation should be a flood, send not broadcast frame, data frame is the destination address has not changed,,,
This is my understanding, just begin to contact, don't know, right,

CodePudding user response:

Address don't change, just send from all the ports in addition to the source port, the receiver will not response, only real receive will respond, this switch will know two MAC corresponding port,

CodePudding user response:

He is asked to all: are you a? So only a response to him that, after you receive the other, confirm that you are not, will discard the package, of course, some people will collect the package to do other things

CodePudding user response:

First 1 to 3, affirmation is to send ping packets to go out, this package contains the source IP destination IP source MAC destination MAC (ff ff ff ff - (ff), when the packet switches to switch the corresponding interface display learning source MAC and then look at your MAC table corresponding to the packet destination MAC is broadcast MAC flooding out here, all PC receives the packet, open it to check the IP is discarded, not 3 pieces found himself will also be a package back to 1 destination IP source IP destination MAC source MAC for unicast packet switch the forward received data to continue learning 3 to 1

CodePudding user response:

Switches received 1 to 3 single broadcast, exchange the opportunity to find the MAC address table, if the destination MAC can't find, will be in the collision domain forwarding this message, the message itself is not switch changes,