after minimal checks and no waits http://deb.debian.org/- debian/ experimentalN/D Pre-release experiments by developers (optional, only for developer) http://deb.debian.org/- debian/ stable-proposed-updates Transmission Unit (MTU) automatically. In some occasion, you may wish to set MTU manually after experiments with ping(8) with ”-M do” option to send a ICMP packet with various data packet size. MTU is the