Stupid poe question?

Question

Mikrotik

I have never implemented this scheme. For this reason, I do not know the answer to it. but nothing to check. let's say we have https://www.ubnt.com/edgemax/edgerouter-x/ you can supply power to the first port to power the router itself through it. Will this be enough to put another poe consumer device on the last port? Or will the power to the last port be taken only from the power supply? I'm interested in the implementation scheme for both Mikrotik and Yubikuti.
Let's say that we take the Mikrotik model routerboard.com/RB750P-PBr2. 1 port for input and 4 for output. really? or 4 ports will take power only from the power supply?

Answer 1

Power may not be enough

Answer 2

Will not work. The topology is called daisy-chain, special injector adapters are sold