Which protocol is known for transferring data from servers to workstations in NetWare networks?

IPX, or Internetwork Packet Exchange, is a protocol specifically designed for use in NetWare networks. It was the primary networking protocol used by Novell's NetWare operating system for handling data transfer between servers and workstations. IPX operates at the network layer of the OSI model and is responsible for the addressing and routing of packets within local area networks (LANs) as well as across multiple networks.

In the context of NetWare networks, IPX serves several key functions: it enables communication between various network devices, facilitates the transmission of data packets, and supports various networking features such as packet routing and session establishment. Since it was optimized for use in these environments, IPX became known as the backbone protocol for the NetWare ecosystem, allowing workstations to efficiently access server resources.

In contrast, the other options do not fit this specific role. IP is a foundational protocol for internet communication, ISDN relates to digital telecommunications for voice and data over traditional phone lines, and Ethernet serves primarily as a method for local area networking rather than a protocol for transferring data specifically in NetWare environments.