I would not recommend it. Here's why ...
To do many parts of an operating-system upgrade, particularly a major upgrade like this one, you need to "put the patient on a heart-lung machine." The operating system whose parts you are replacing is therefore not the one that is running on the machine at the time.
You do this by burning a CD-ROM (or a USB stick, if your machine can boot from that and if the stick is big enough), which contains at least enough software to boot into Linux, identify the hardware on the device, identify the network and so-on.
Now, once you are at that point, then yes, you can arrange to draw the material that you need to install, from some network server.
Red Hat actually provided tools to do that sort of thing, which they called "Kickstart" disks. I haven't been in the Red Hat world for a while so I don't know if they still provide it. Probably, they still do.