[lelio]

The internet's domain name system root servers have been pounded with up to 50% more domain lookups

Why do the root servers get this many requests? Shouldn't ISPs cache most of this information?

[TechJunkYard]

Shouldn't ISPs cache most of this information?

Yeah, but if the ISP's nameserver(s) is/are getting slammed, the client will eventually time out and go to the next nameserver. When it runs out of nameservers, it goes to the root nameservers.