Shared memory protocol   If the client and database server are on the same computer, shared memory (the default protocol) is recommended.

TCP/IP protocol   If the client and database server are on different computers, you must use TCP/IP. The network server allows TCP/IP connections by default, while the personal server does not. The personal server can accept local (but not remote) TCP/IP connections by specifying the -x tcpip option. Clients use the Host or CommLinks connection parameters to establish TCP/IP connections to the database server.