Image via WikipediaA user is unable to connect to a file server on your 10BaseT network (twisted pair Ethernet), although he is able to connect to folders on other computers. A single hub exists on the network. 10BaseT Twisted Pair Ethernet What hardware problems should you investigate?
Answer: Either a defective network interface card (NIC) on the file server or a defective hub port connected to the file server would prevent users from connecting to the file server. A defective cable between the file server and the hub would prevent communications between users and the server. Client/server communication problems can also be related to software issues. The user may not have permission to access the file server, or the user may not have the correct name or address of the file server. If the network has multiple subnets, problems could occur because of incorrect subnet mask settings or incorrect gateway address.
Advanced Network Adapter troubleshooting for Windows workstations