answered graded A+
Purpose of Network Modeling - correct answer ✔✔To help system designers distribute the
technical data, processes, and interfaces across the computer network.
Systems Analyst Role in Network Modeling - correct answer ✔✔To specify a technology-
independent communications that must occur between business locations.
The need for network modeling is being driven by: - correct answer ✔✔distributed computing
Distributed Computing - correct answer ✔✔The assignment of specific information system
elements to different computers which cooperate and inter-operate across computer network.
Client/server networking
Network modeling questions examples - correct answer ✔✔- Do any users travel while using
the system?
- What are the user's data and processing requirements at each location?
- How might data and processes be distributed between locations? Or distributed within a
location?
Network Modeling - correct answer ✔✔is a diagrammatic technique used to document the
shape of a business or information system in terms of its business locations.
,Location Connectivity Diagram (LCD) - correct answer ✔✔is a logical network modeling tool that
depicts the shape of a network system.
The location connectivity diagram (LCD) illustrates 2 concepts: - correct answer ✔✔1. Locations
2. Connectivity
Location - correct answer ✔✔is any place at which users exist to use or interact with the
information system.
Examples of Logical Locations: - correct answer ✔✔- any business office/factory/warehouse
- ATM machine
- Airline ticket counter
- Office on the move (traveling salesman)
- Clusters of similar locations
- Customers' site
Business Geography - correct answer ✔✔Derivatives of the rectangle will be used to illustrate
different types of locations.
Standard rectangle - correct answer ✔✔Specific location
Rectangle with double vertical lines - correct answer ✔✔Cluster of locations
Rounded rectangle - correct answer ✔✔Mobility
Parallelogram - correct answer ✔✔External organizations and agents
,Ex. customers, suppliers, taxpayers, contractors, etc.
Location names should describe: - correct answer ✔✔the location and/or its users.
Ex.
- Paris, France (vs. Paris, Texas)
- Van Munching Hall
- Building 105
- Silver Spring Warehouse
- Shipping Dock
- Order Clerk - User names (as locations)
- Customers - Customer names (as locations)
- Suppliers - Supplier names (as locations)
Some locations consist of - correct answer ✔✔other locations and clusters.
Location Decomposition Diagram - correct answer ✔✔shows the top down geographic
decomposition of the business locations to be included in a system.
Connectivity - correct answer ✔✔Connectivity defines the need for, and provides the means for
transporting essential data, voice, and images from one location to another.
Connections between locations represent - correct answer ✔✔the possibility of data flows
between locations.
There are ________ for location connectivity diagrams. - correct answer ✔✔no universal
standards
, It is permissible to annotate LCDs with symbols from - correct answer ✔✔other models, such as
data flow diagrams.
Network, data, interface, and process models represent - correct answer ✔✔different views of
the same system, but these views are interrelated.
System Analysts need to _____________ the different views to ensure _________ and
_________ of the ________________________. - correct answer ✔✔System Analysts need to
synchronize the different views to ensure consistency and completeness of the total system
specification.
Data and Process Model Synchronization: - correct answer ✔✔1. There should be one data
store in the process models for each entity in the data model.
2. There should be sufficient processes in the process model to maintain the data in the data
model.
Data-to-Process-CRUD Matrix - correct answer ✔✔C = create
R = read or use
U = update or modify
D = delete or deactivate
The rows in the CRUD matrix indicate - correct answer ✔✔entities and their attributes as they
appear in the proposed system ERD.
The columns in the CRUD matrix indicate - correct answer ✔✔elementary processes as they
appear in the proposed system DFDs.