Dec 112017
Tutorial and quiz concerning OSI model and GOSIP compliance. Excellent for anyone who develops software for the government.
File GOSIP.ZIP from The Programmer’s Corner in
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Tutorial and quiz concerning OSI model and GOSIP compliance. Excellent for anyone who develops software for the government.
File Name File Size Zip Size Zip Type
C1.EXE 33920 13861 deflated
C2.EXE 33776 13757 deflated
C3.EXE 29248 13409 deflated
C4.EXE 27696 12473 deflated
C5.EXE 79840 26762 deflated
C6.EXE 61472 21694 deflated
C7.EXE 59424 20029 deflated
C8.EXE 22656 10030 deflated
CGA.BGI 6029 4176 deflated
GOSIP.EXE 37408 21084 deflated
GOSIP.TXT 7531 2708 deflated
LITT.CHR 2126 950 deflated
README.TXT 14647 4507 deflated
SI.GOS 16 5 deflated
TRIP.CHR 7213 3654 deflated

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Contents of the README.TXT file

Standards Illustrated, Inc.

GOSIP Illustrated Version 1

Introduction - This file contains information beneficial for
using Standards Illustrated Version 1 of GOSIP Illustrated
software. Please address your comments to:

Standards Illustrated, Inc.
1201 South Eads Street, Suite 1501
Arlington, Virginia 22202

Table Of Contents

1. System Requirements
2. Organization
3. Functional Keys & User Messages
4. Computer Timed Illustrations
5. Chapter Quizzes

1. System Requirements

GOSIP Illustrated Version 1 requires a 100% IBM (1) PC compatible
computer, a Color CGA Monitor, DOS 3.0 or higher, and 256K of
memory. Your DOS CONFIG.SYS file must contain DEVICE=ANSI.SYS for
the software to operate properly. You must also specifiy the path
of the software. For example, to run the programs from your B
drive, set PATH=b:\. To run from a hardisk directory named \MYDIR,
set PATH=c:\MYDIR. Consult your DOS Reference Manual for further
details. For maximized performance we recommend an 80386 class
machine with the software loaded onto a hard disk. GOSIP
Illustrated will operate on 8088/8086 and 80286 machines from the
disk drive.

If you encounter problems running GOSIP Illustrated on your
system, first check to insure that your CONFIG.SYS file contains
the device driver for ANSI.SYS. If you still have problems check
your AUTOEXEC.BAT file to see if it contains application specific
drivers which alter the operation of your graphics board. GOSIP
Illustrated has been successfully tested on CGA, EGA, and VGA
systems. If you make any changes to your CONFIG.SYS or
AUTOEXEC.BAT files, warmstart your system with the
Ctrl+Alt+Delete keys.

2. Organization

Table of Contents and Chapters

GOSIP Illustrated has been organized in a manner similar to
the organization of a book. The software contains a Table of
Contents screen which is displayed automatically upon starting
the software. From the Table of Contents, the user may select
any one of eight chapters. Chapter screens are sequentially
numbered. Please note that chapter illustration screens are not
numbered screens. Upon completion of a chapter, the software
automatically returns the user to the Table of Contents from
which another chapter may be chosen, or an exit from the program
may be chosen.

Screen Categories

GOSIP Illustrated Version 1 contains four (4) categories of
screens (1) information screens (2) illustration screens (3) test
screens, and (4) score screens. In some cases, a screen may
combine two categories into a single display. The following
briefly describes the four categories:

(1) information screens - provide the user with generalized as
well as specific information regarding the standards
incorporated into GOSIP. Each screen should be thoroughly
understood before proceeding to the next.

(2) illustration screens - provide the user with graphic
illustrations of the operating mechanics of GOSIP standards.
Where appropriate, illustration screens also provide the user
with technical notes, "Tech Notes." The information contained in
the tech notes is important to remember because the material is
covered in GOSIP quizzes.

(3) test screens - provide the user with the feedback
necessary to facilitate a genuine educational experience.
Questions have been designed to test how thoroughly the student
has mastered the presented material, and how well the student can
apply the material. Not every chapter includes a quiz. However,
in order to obtain the greatest benefit from GOSIP Illustrated,
we highly recommend that each chapter quiz be completed by the

(4) score screens - provide the user with a calculated score
which is based on the number of question correctly answered as a
proportion of the total number of questions. Each chapter which
contains a quiz also has the ability to calculate a quiz score.

User Control

Users interact with GOSIP Illustrated through a variety of
keyboard commands. Keyboard commands include function keys,
special keys such as Page Up, and alphanumeric keys. The bottom of
each screen in GOSIP Illustrated contains a red command line
which indicates which keyboard commands are enabled for the
screen. The keys are more fully explained in section 2.

3. Functional Keys & User Messages

Functional keys are keys to which GOSIP Illustrated software
responds by performing the user requested action. All other keys
pressed by the user are ignored. Take a moment now to
familiarize yourself with the important keys and messages
operational with your software:

Wait - This is an informative message displayed to the user in
the red command line of a screen. This message
is only displayed when the software is performing a
previously requested action. When the message "Wait" is
displayed on the command line, all other keyboard commands
are ignored until "Wait" disappears. Upon completion of
the user requested action, the software checks your
keyboard buffer to determine if additional action has
been requested. We recommend that the user "Wait" for
a requested action to be completed before requesting

Pause - Many of the functions performed by GOSIP Illustrated are
timed events. Protocol illustrations, for example, have
a set length of duration. A user who wishes to
temporarily stop a running illustration may do so by
pressing the pause key.

Return or Enter keys - These keys are operational only if a user
has temporarily stopped an illustration. The Return or
Enter keys may be used to resume the illustration.

Esc - This is an abbreviation for the "Esc" key on IBM PC
compatibles. The abbreviation stands for Escape. Escape
is functional from any screen in any chapter, as well as
from the Table of Contents screen. When used from chapter
screens, Esc returns the user to the Table of Contents.
When used from the Table of Contents, GOSIP Illustrated
is terminated and the user is returned to the DOS prompt.

PgDn - This is a user selectable function which enables the user
to progress through the software to the next numbered
screen. PgDn is an abbreviation for your Page Down key.
Some keyboards, 101 keys, have two (2) Page Down keys. If
you choose to use the Page Down key located on your number
pad, you must make sure that Num Lock is off. This is
the normal manner for operation on 101 key keyboards.

PgUp - This is the abbreviation for your Page Up key. It enables
the user to bring back previous pages for additional

Function Keys - [ F1, F2, F3, F4, F5, F10 ]

Function keys are only displayed on screens for which use of
the function key is enabled. The standards incorporated into
GOSIP each have different capabilities and features. Therefore,
the specific action performed by function keys F2, F3, and F4
vary according to the protocol. However, the function performed by
these keys is indicated on the command line. Three function
keys are used for the same purpose throughout GOSIP Illustrated
chapters. They are as follows:

F1 - Function key F1 is always used to begin an
illustration. F1 is only displayed on numbered
information screens and when pressed displays the
appropriate unnumbered illustration screen.

F5 - This key is used only on Chapter Quiz screens.
Pressing F5 on a Chapter Quiz screen retrieves the
next chapter question.

F10 - This function key is used only on one screen within
GOSIP Illustrated. In chapter 7, FTAM File Access is a
user selectable illustration. F10 overlays the
customary "Wait" and enables the user to decide when
to return to the FTAM selection menu. Because F10
overlays "Wait" all other displayed user selectable
options are disabled.

Chapter 7 Notice

Chapter 7, GOSIP Applications [FTAM and X.400] Illustration
screens differ from those in previous chapters which dealt with
protocol operations. This is because communications protocols
are not typically displayed user operations but are carried out
invisibly by computer operating systems.

Application Layer standards however do involve the display
of information to users. This reality is carried forth in GOSIP
Illustrated Chapter 7 by the illustration of a computer terminal on
your screen. The illustrated computer terminal contains
function keys and messages, just like your real command line
contains. However, the illustrated computer terminal command
functions are NOT your command options. Your command options
remain displayed on your red colored command line.

4. Computer Timed Illustrations

GOSIP Illustrated Version 1 contains many computer timed
events. The following provides a chart of average times:

Chapter Illustration Duration in Seconds

3 Connection Oriented 45
3 Connection Less 25
5 ISO 8473 25
5 ISO 8202 50
5 ISO 7776 50
5 ISO 8802/2 25
5 EIA RS-232C/D 65
5 CCITT V.35 Pins 105
6 ISO 8823 35
6 ISO 8327 35
6 ISO 8073 60
7 ISO 8571
File Access 20
File Transfer 85
File Management 27
7 CCITT X.400
Read Messages 6
Send Messages 120
All Wrong Quiz Answer 10
All Chapter Quiz Scores 10
Table of Contents Scores 15

5. Chapter Quizzes

GOSIP Illustrated chapters 1 - 7 each contain a quiz. The score
you obtain from each quiz is based on the number of questions
you correctly answer divided by the number of questions for that
chapter. The chapter score screen appears upon exiting a chapter
only if you answered a question from the quiz. You may decide to
retake a quiz at any time by using the PgUp key and then PgDn
back to the quiz. This will reset all of your scores. For
example, chapter 3 contains 5 questions, and each question is
worth 20 points. A total score for GOSIP Illustrated, as well is
your individual chapter scores is available from the GOSIP Table of
Contents by pressing the number 9 key. The following table
indicates the number of question per chapter:

Chapter Number of Questions Value of Each Question
1 10 10
2 10 10
3 5 20
4 5 20
5 20 5
6 10 10
7 10 10

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1. IBM is a registered trademark of IBM Corporation.

The following is not applicable within the United Kingdom or
other countries where these provisions are not consistent with
local law:

A PARTICULAR PURPOSE. This statement may not be applicable in
states which limit or do not allow a disclaimer of express or
implied warranties for certain transactions.

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