Incomplete ARP table entry

is it normal to have an incomplete arp table with proxy03.fedoraproject.o ?
ive been having some trouble running updates lately on my acer aspire 5736Z-4685 and im beggining to think it may be related to hardware compatibility
let me know what you think?
IMG_20190530_204308

Well, in reality an ARP table only contains the MAC addresses of the hosts of the networks which a network card is connected to.
So it is impossible to see MAC addresses of internet hosts.

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my internet connection is not hosted by fedoraproject.o

just an update my wifi adapter interface has changed
brother@localhost ~]$ arp
Address HWtype HWaddress Flags Mask Iface
_gateway ether 00:00:5e:00:52:13 C wlp4s0b1

is someone trying to put a pinhole in the firewall?