[CentOS] Is avahi essential?

>ARP: In a traditional ethernet network, when you try to connect to a
>machine on your local network with the number 10.20.30.40 then your
>machine will send out an ARP broadcast packet "whois 10.20.30.40" and
>then the machine in question will respond with its MAC address and then
>the machines can talk via ethernet.

Ain't it the router the one that responds?

I mean, it usually has an ARP table to speed up things ;)

Regards