z/VM: TCP/IP User's Guide - z/VM - IBM

TCP/IP Protocols and Functions
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The widget set developed by MIT’s Project Athena is generally known as the
Athena Widget set. It enables application programmers to include standard
graphic elements in their applications.
OSF/Motif
OSF/Motif** is an X Window System toolkit defined by Open Software
Foundation, Inc. (OSF**), which enables the application programmer to include
standard graphic elements that have a three-dimensional appearance.
Performance of the graphic elements is increased with gadgets and windowless
widgets.
GDDMXD
GDDMXD is an interface that allows graphics from the IBM Graphical Data
Display Manager/VM to be displayed on workstations that support the X Window
System.
When GDDMXD is installed and activated, the data stream created by GDDM ® is
translated to the X Window System protocol and transmitted by TCP/IP to the
X Window System server for the display. If GDDMXD is installed and not
activated, or has been made inactive, GDDM transmits data to its supported
display device as if GDDMXD was not present.
Remote Procedure Call (RPC)
The Remote Procedure Call Protocol (RPC) is a programming interface that calls
subroutines to be executed on a foreign host. RPCs are high-level program calls,
which can be used in place of the lower-level calls that are based on sockets.
For more information about RPC, see RFC 1057.
Network File System (NFS)
The Network File System (NFS) allows you to manipulate files on different TCP/IP
hosts as if they reside on your host. NFS is based on the NFS protocol, and uses
the Remote Procedure Call (RPC) protocol to communicate between the client and
the server. The files to be accessed reside on the server host and are made available
to the user on the client host.
The Network File System supports the hierarchical file structure used by the
UNIX ® operating system. The directory and subdirectory structure can be different
for individual client systems.
For more information about NFS, see RFC 1094 and 1813.
Remote Execution Protocol (REXEC)
The Remote Execution Protocol (REXEC) allows you to execute a command on a
foreign host and receive the results on the local host. Remote Execution Protocol
provides automatic logon and user authentication, depending on the parameters
set by the user.
Bootstrap Protocol (BOOTP)
The Bootstrap Protocol (BOOTP) allows a diskless client machine to discover its
own IP address, the address of a server host, and the name of a file to be loaded
into memory and executed.
For more information about BOOTP, see RFC 0951 and TCP/IP Planning and
Customization.
Chapter 1. Introducing Computer Networks and Protocols 9