DHCP images are provided by the above links.
Usually right-click -> extract.
Tip: you can use the tar command in the linux subsystem for windows
Identify your microSD card using the output of lsblk and flash the created image to your microSD Card with dd or dcfldd:
$ sudo dd if=arch-linux-X-XXXXXXXX.img of=/dev/sdX
Windows users should use the rufus utility to write the image to the microSD card.
Be sure you don't forget to expand the rootFS partition to occupy the rest of the microSD card! Forgetting to expand the root partition is the number 1 source of errors. I am unfamiliar with the process for doing this on windows.
To expand the root filesystem partition, I use gnome-disks.
Many utilities exist on linux for doing this including parted gparted cfdisk just to name a few.
You should have an image on the microSD card at this point.
Continue with the Bootstrappig guide