Class Discussion on March the 3rd for IT Foundations

This week in class we discussed Networking and the terms and acronyms that go with the networking world. We talked about NIC's, the OSI model, TCP, and IP. We also discussed the seven layers of the OSI model and I will go in detail about this subject. The OSI model was created by the ISO, which stands for the International Organization for Standardization. OSI stands for Open Systems Intercommunication. The OSI has seven layers and I remember the layers by an acronym: Programmers Don't Never Throw Salty Pretzels Away. Stay with me it was so confusing to me but keep in mind that this happens in milliseconds, and us as humans don't even know all the work that is going on behind the scenes of a simple email.
1. Physical Layer- this is responsible for mechanical, electrical & procedural with the physical link.
2. Data Link Layer- this actually has two different layers into one: LLC which is the Logical Link Control and the MAC which is the Media Access Control. This provides reliable, accurate data transfer over the physical link.
3. Network Layer - this is where the routers are placed and organizes the data into IP datagrams or packets.
4. Transport Layer - Provides reliable transport between end points.
5. Session Layer - the easiest one for me to remember and understand, it simply establishes, maintains, and terminates user connections.
6. Presentation Layer - Provides useful transformation of data using a common language.
7. Applications Layer - Interface to the user