Netcat is basically just a utility to listen on a socket, or connect to one, and send or receive arbitrary data. And as, in Linux, everything is a file, which means you can handle every part of your system (eg. block devices [physical or virtual disks]) like a normal file, i.e. text, you can just transfer a block device (e.g. /dev/sda3) over raw sockets.
'Yes boss, I need 16-Bit, 32-Bit and 64-Bit Arm and x86_64 ASM as well as MySQL, SQLite, Postgres, Firebird, Mongo and all other stuff too, so I need a lot of computers … of course all with Threadripper PRO 7995WX’s.