Hello there. If a similar question has been asked, I apologize for the inconvenience. With regards to my situation, I am a beginning network administrator under the watch of 20 workstations in my classroom. Firstly, the computers have been set as a Windows workgroup. Once the network was handed over to me, I decided to set up a domain. However, this is just to give you a general background of the current situation with my network. Anyhow, back to my question. The local network is on the same VLAN. The workstations are running the following OSes: Win 9x, 2000, and XP. Additionally, The Domain Server cannot view the workstations that are currently connected to the Workgroup. Why can't some of the computers on the local network ping each other, or be viewed in Network Neighborhood? Mind you, the problem is intermittent. Thank you.