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A DNS lookup can be answered by any DNS server in the world, so even if that goes down you can retry with another one. If the equipment responsible from taking
by Rjevski 9y ago
A DNS lookup can be answered by any DNS server in the world, so even if that goes down you can retry with another one. If the equipment responsible from taking calls from your phone is down there often isn't a second one it can automatically fail over to.
- Aloha 9y agoThats comparing two vastly different parts of their respective networks though - its a bit like comparing Apples and Volkswagens. No ONE DNS server is as reliable as a Class 5 Telephone Switch. The telephone network is on whole more reliable than any single component of the internet - and its certainly more reliable that the internet on whole. The internet however is more survivable - much more, because there are less common choke points to fail. In a way you are correct though - nearly every component required for internet access is unreliable (because you can substitute another one with ease) whereas every network element in a phone call is much more reliable (because beyond a certain point, you cannot).