1. Networking Solutions Chapter 2 – The OSI Model

2. The Layered Approach Similar to a company like ◦ Advantages ◦Divides the network into ◦Multiple vendors can ◦Encourages ◦Prevents changes in one layer

3. The OSI Model 7 Application 6 Presentation 5 Session 4 Transport 3 Network 2 Data link 1 Physical

4. Application Layer Where the user Apps like IE interact with Note on page

5. Presentation Layer Presents data to the Application Layer and is responsible for and occur at this layer

6. Session Layer Responsible for Coordination is established in

7. Transport Layer Segments and (connection-oriented) or (connectionless) SYN / ACK Flow

8. Network Layer Addressing of Track Determines Packets sent are either

9. Data Link Layer Provides Routers don’t care Switches care about Two sublayers:

10. Physical Layer Sends is defined at this layer

11. Other “stuff” to know Router points on page 47 802.X on pages 49 / 50 Encapsulation on page 51