ip neigh display a mac address at a coffee store

Question

I am working at a coffee store and tried command ip

user@host:~$ ip neigh
192.168.1.1 dev wlp3s0 lladdr 5c:dd:70:96:80:52 REACHABLE

I am aware that 192.168.1.1 is the router address,

How about 5c:dd:70:96:80:52? is it a mac?

Answer 1

Yes, this command basically outputs the table your PC uses to match IP addresses to physical addresses (MAC address) accessible from your node on the network (i.e. your immediate LAN network only, including any switches/hubs, but not beyond any routers).

If you know that *.1.1 address is your router, then 5c:dd:70:96:80:52 is its MAC address, at least on its local interface. It will have a different MAC address on its external interface (the one that your ISP sees).