fillo
--tun-mtu-extra ... TAP devices may introduce additional overhead in excess of the MTU size, and a setting of 32 is the default when TAP devices are used.
1. Where do these 32 bytes? And why are they needed? What is their nature?
--fragment adds 4 bytes of overhead per datagram.
2. Where do these 4 bytes? And why are they needed? What is their nature?
I'm interested in these facts, curious.
