I briefly described NDIS 3.1 back in the Hardware section, but
   I'll cover it quickly here again. It's a Plug & Play version of
   Microsoft's Network Device Interface Spec, which lets you do cool
   stuff like disconnect from the network when you undock your notebook,
   then re-connect as soon as you insert a PCMCIA network card, or dial
   in with your modem.
   
   Win95 has four classes of network components: Clients (For using
   shared resources), Services (for sharing or controlling shared
   resources), Transport Protocols (To communicate over network cards),
   and the network cards themselves. Protocols can use any network card,
   and usually, clients and services can use any protocol (there are
   specific dependencies, such as Client for NetWare on IPX/SPX
   Protocol). Clients are actually file system drivers, which use local
   caching (VCACHE) to off-load the server a bit.
   
   NDIS 3.1 software does NOT occupy conventional memory, so if you have
   all Win95 clients, services, drivers, and protocols, you can run your
   DOS programs within Win95 without worrying about how much RAM you
   have. This goes for IPX network games too.
   
   All net components in Win95 should conform to this, otherwise don't
   waste your time.