Linux @lemmy.ml driftWood @infosec.pub 3 mo. ago

How does a computer create a 'Response' packet? - Infosec.Pub

infosec.pub How does a computer create a 'Response' packet? - Infosec.Pub

Consider a Ping Request packet arriving on a computer with 2 NICs (multi-homed PC). The packet is received on 1 of the interfaces. Now the computer has to send the Ping Response packet. To fill the source IP and source MAC address the computer does which of the following? - Computer first determines...

Reposting here since want to know how a Linux computer handles this scenario.

7 comments

These are standards. If it worked differently it would be using a different networking protocol.
- Standards are set of rules. But still different vendors implement them separately. For e.g. TCP/IP stack implementation is a bit different in Windows and Linux but end user generally never realises this because it's close enough that things still work. I want to know what is the sequence of events when Linux creates a Response packet for a ping Request it received.
  
  What you have linked to is a high level overview of what happens in an ICMP response, regardless of what OS or network stack you are using.
  
  If you ask me to describe what Linux would do at that kind of level, well, exactly that.
The same way.

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