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Printable Version: RFC929.PDF
RFC 929 December 1984
Proposed Host-Front End Protocol
indicates the desired precedence level, with zero being the
lowest, and nine being the highest. The specific
interpretation of this parameter is dependent on what service
options are provided by the protocol. The default value of
this parameter is the lowest precedence (ROUTINE), and no
special service requests. The control flag for this parameter
is -ts.
Flow Control Advice
The Flow Control Advice parameter contains information on the
flow characteristics desired by the user. Some applications
such as file transfer operate more efficiently if the data is
transferred in large pieces, while other, more interactive
applications are more efficiently served if smaller pieces are
used. This parameter then indicates whether large or small
data blocks should be used. It is only relevant in stream or
connection-oriented protocols, where the user sends more than a
single piece of data.
This parameter is represented by a single ASCII digit. A value
0 means the data should be sent in relatively small blocks
(e.g., character or line oriented applications), while a value
9 means the data should be sent in relatively large blocks
(e.g., block or file oriented applications). Other values
represent sizes between those extremes. The character "N"
indicates that no special flow control advice is provided. The
actual interpretation of this parameter is dependent on the
particular protocol in the OPE. The default value of this
parameter is no flow control advice. In this case, the protocol
in the OPE will operate based only on information available in
the OPE. The control flag for this parameter is -fc.
Local Address Primary Component
This parameter contains the local address primary component. It
is anticipated that under most circumstances, this component is
known to both the Host and the OPE. Consequently, this
parameter is seldom required. It would be useful if the Host
desired to select one of several valid addresses, however. The
control flag for this parameter is -lp.
Security
The security parameters contain a set of security level,
compartment, community of interest, and handling restriction
information. Currently, security is provided by performing all
Lilienkamp & Mandell & Padlipsky [Page 18]