Assume a VPS that runs as a webserver and ns1. Also assume that you have a secondary nameserver, ns2, on a separate VPS.

If the VPS with the webserver and ns1 goes down, is any advantage gained by having had ns2 on a separate VPS? Does the ns2 help with caching mail? Doe the ns2 make the webserver/ns1 VPS accessible more quickly when it comes back online?


Thanks.