We have a major issues in our network. Our LAN is having a hard time browsing and ping external site and is extremely slow. We have issues where RDP to our servers takes some time to resolve. Our Applications seem to be having TimeOut issue. We can browse the IE Explorer, but takes some time before it can resolve. Our IT Director setup a new server and called it a new domain, thus setup DNS, WINS, DHCP. He is migrating our old Win2003 server to the new Win2008 server.
However, we have a set back due to our issue. Any suggestions as where to start troubleshooting would be very helpful.