As far as I have understood correctly this SE site is NOT the correct site for the following two types of questions:
Questions about network protocol theory
Example: "How is a packet routed if the XYZ field in the IPv4 header is set to 123 which is a reserved value according to RFC 123456?"
Questions about network development
Example: "I'm working on a router firmware. How should my firmware react on IPv4 packets having the XYZ field set to 123?"
Note that both types of questions might also be related to home networking or OSI layer 5-7 protocols.
The sites linked in the site help seem not to be suitable:
On this site you may ask questions if you already know how your program (e.g. the router firmware) shall work and you don't know how to implement this.
You cannot ask a question if you don't know the desired behavior of your program, yet.
This site seems to be focused on the "user view" of networks, not on network theory nor on network development.
This site is focused on the hardware which is OSI layers 1 and possibly 2, but not OSI layers 3-7.
Is there any SE site (or SE sites) suitable for this type of questions?