My network has 80 nodes through a T1. Our DNS is through the ISP. I have noticed that sometimes a computer cant see the DNS server for a few minutes. The connection will be there, then it is lost only for a few minutes. Then it comes back on and resumes. This can happen on any computer on the network. I can still see the DNS from other computers while this is happening. This problem isn't isolated to any one machine. Is there a limitation for nodes that can access the DNS at one time from a given network? or is the DNS overloaded?