Why do different IP addresses have the same MAC address?

Question

Computer networks

Good day to all.
Recently I captured traffic on the local network using Wireshark, when analyzing and studying it, I saw that several IP addresses have the same MAC address, there are 5 such addresses, I googled it, I saw that you can make aliases, that is, additional IP addresses for a machine on the local network , but it turned out that this is not one machine, but different ones, and the answer lies in the operation of the local network at level 2. I just can’t understand why the poppy is the same, but the IPs are different. Tell me, please, why is that so?

Answer 1

If this is a normal dump from the local machine, then for packets destined for a different network than the local machine's network, all dst mac addresses will be the gateway address. Accordingly, for packets from another network to your machine, the src mac address will always be the gateway address. If the same poppy addresses for IP on the network of the local machine come to mind the following example:
There may be other options.
If you do not understand what I mean, just accept it as a fact that this is how it should be.

Answer 2

Because these IPs are from another network that is accessible to you through the router, and this MAC address is actually the address of the router? ;-)

Answer 3

Alternatively, DHCP is buggy. The question is missing information.

Answer 4

You can force the same MAC addresses. If we are talking about IP addresses behind the router, then they will have one MAC address. To see real MAC addresses - ARP proxy must be configured on the router.