2. How does IT enable our business?
Jimmy Lambert
Chief Information Officer
TigerJuice, LLC
TIGER JUICE
LSU

3. What happens next?

4. www.TigerJuice.com Our website enables our customers to:
Find information about our product and company
Order our product directly to their doorstep
Provide feedback
Connect to the TigerJuice community
But how does this resource function?

5. Who is involved? The Client Client Internet Service Provider (ISP)
Our Internet Service Provider
Our Web server

6. Simplified Model The Client Client ISP Our ISP The World Wide Web
Our Web Server

7. The Client Individual accessing our site from home.
What do they need to accomplish this?

8. A Personal Computer
Internet Browsing Software
A Router
A Modem
An Internet Service Provider

9. Network Interface Card
Receives network data
Transmits network data
Can be wireless or wired
Includes a unique identification number, called a Media Access Control (MAC) address.

10. Common Wired Setup
Cat5 Cable transfers and receives data to/from modem provided by ISP

11. The modem most often connects to a wall cable outlet using a coaxial copper cable, or to their phone line depending on the type of internet service they utilize.

12. The ISP provides the client, and our own web server, the use of their infrastructure to connect to the global network we call the internet. While it has grown too vast to easily visualize or define, the world wide web is made up of fundamentally similar smaller networks. To aid in their understanding, the OSI model was developed.

13. Open Systems Interconnection (OSI) Model
Model used to understand networks in-depth.
Attempts to standardize the language used to describe networks.
Aids in the diagnostics of network issues.
Made up of 7 logical layers.

14. Layer 7 Application
Layer 6 Presentation
Layer 5 Session
Layer 4 Transport
Layer 3 Network
Layer 2 Data Link
Layer 1 Physical

15. Layer 1 - Physical
The physical layer of the OSI model contains the lowest level of abstraction.
Included in this layer are purely physical components, namely:
Cabling
Hubs
NIC’s

16. Layer 1 - Physical
Cables attach each computer in a network to a hub, allowing communication between machines connected to the network.
A typical hub.

17. Layer 2 – Data Link
NIC’s are technically involved in the physical layer, but they are most integral to the second layer.
The data link layer is further separated into two parts:
LLC
MAC

18. Layer 3 – Network
The network layer is concerned primarily with routers.
Routers separate large networks into smaller ones.
Clients most commonly use routers for their home wireless network.

19. Layer 3 – Network
Routers forwards packets of data based on the Internet Protocol (IP) address associated with the data.
IP addresses are designated to entities on the network to manage the transport of packets to their destinations.
Routers serve to organize packets in the correct structure between networks of differing signal or data type.

20. Layer 4 - Transport
The transport layer protocols take large groups of data and separate them into smaller numbered packets.
This allows packets, which may arrive at different times or with many other unrelated packets in between, to be reassembled by the receiving system in the correct order.

21. Layer 5 - Session
The Session layer handles requests from multiple machines on a network, organizing those requests into ‘sessions’, to further insure an effective and efficient network.

22. Layer 6 - Presentation
The presentation layer is concerned with different data formats between systems.
The presentation layer protocols allow networks with different data formats to communicate through standardized formats.

23. Layer 7 - Application

24. Layer 7 - Application
The application layer includes network applications such as web browsers like :
Firefox
Internet Explorer
Google Chrome