Just the basic difference .

DNS will work at global level i.e., when you type domain name google.com in browser, DNS lookup will take place and it will give the IP associated with the domain google.com .In general DNS translates a domain name ('gazolinia.blogspot.com') to an IP address (e.g.

Whereas ARP will work at link layer and translates an IP adrress (e.g to a MAC address (e.g. 00:11:12:13:14:15) .

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