1. Data Network Designing and Evaluation
CPIT 375
Data Network Designing and Evaluation
Network Architecture

2. Outline: What is Network Architecture ?
Difference Between Architecture and Design
How to develop Network Architecture ?
Component Architectures
Architectural Models

3. What is Network Architecture ?
Network architecture, is the logical and structural layout of the network consisting of transmission equipment, software and communication protocols and infrastructure (wired or wireless) transmission of data and connectivity between components. 
It required understanding of the relationships between components of the network.
The user requirements should be directly represented in the network architecture.

4. Difference Between Architecture and Design

5. Defining Network Topology
There are 4 different network topologies:
Star network
Bus or Line network
Loop or Ring network
Mesh network. 

6. Defining Types of Network
LAN (Local Area Network)
MAN (Metropolitan Area Network)
WAN (Wide Area Network)

7. Component Architectures
Component architecture is a description of how and where each function of a network is applied within that network.
Addressing/ Routing
Network Management
Performance
Security

8. Architectural Model
In developing the architecture for your network there are several architectural models that you can use as a starting point:
Topological models
Flow-based models
Functional models

9. Topological Model
which are based on a geographical or topological arrangement and are often used as starting points in the development of the network architecture
There are two popular topological models:
LAN/ MAN/ WAN models
Access/ Distribution/ Core models.

10. Topological Model
LAN/ MAN/ WAN Model

11. Topological Model
Access / Distribution / Core Model

12. Flow-Based Model peer-to-peer client–server Hierarchical client–server
distributed computing.

13. Functional Model
Functional architectural models focus on supporting particular functions in the network.
service-provider
intranet/extranet
single/ multi-tiered performance
end-to-end models.