We have an ongoing problem on our site. Very frequently I will ping a host name lets Say "Ping PC-A" and get a responce "Reply From 22.214.171.124" . If I then i try "NBTSTAT -a 126.96.36.199" I get back different host name "PC-B". If I call the user of PC-A and get him to do an IPCONFIG he will give me a Different IP that responds fine to a ping as long as I use the IP only. But this problem will also happen if PC-A is offline I will get a reply from a wrong IP instead of a Requst Time out. Seems like a DNS problem but not sure how to resolve it.