Just a last point about Zero 4k. It is said it has gigabit ethernet, We can see it on the manual inside the package. But why people says is has fast ethernet, 10/100 ??? I know an enigma2 image that let to do a speed network test by Ookla... I will load it on multiboot to check the network card...
from telnet or ssh type
ethtool eth0
this will tell you all