1. Telecommunications and Networking

2. Basic concepts

3. Networks

4. Distributed data processing

5. CSS architecture

6. EDI Concepts

7. EDI architecture

8. Basic Communications Model Standards are needed at all Layers
User Layer
Application Layer
Computer (Transport) Layer
Transmission Layer

9. Layering in Major Architectures
Basic Model
TCP/IP
IPX/SPX
OSI
Application
Computer
(Transport)
Internet
Subnet
(OSI)
Application (7)
Presentation (6)
Session (5)
Transport (4)
Network (3):
Internet &
Data Link (2)
Transport:
TCP, etc.
Complex:
SPX, etc.
Physical (1)