> TTL is irrelevant for the first query With a long TTL, the chances are higher that your router or your ISP has the name cached. Round trip to your ISP is ver

> TTL is irrelevant for the first query With a long TTL, the chances are higher that your router or your ISP has the name cached. Round trip to your ISP is very short. If you have a short TTL, the ISPs name server may have to query the next server in the chain. If the authoritative name server is 10000km away, that means at least 60ms extra round trip time (speed of light).