What is (OSI) and why was it created?pg28
Open Systems Interconnection. It helped vendors create interoperable network devices and software so they could be compatible and work together.pg28
P.S. It is the primary architectural model for networks
What is the blueprint of how communications should take place?pg29
Reference model.
Effective communication is processed and divided in to groups called ____?pg29
Layers. If the system is made this way it is known as Layered Architecture.pg29
Different protocols will be in place to meet the different layers needs is called___?pg29
Binding pg29
What are advantages to using the OSI layered model?pg29
- Divides network communication processes into smaller and simpler components,
- Allows multiple-vendor development.
- Encourages industry standardization
- Allows various types of network hardware and software to communicate
- Prevents changes in one layer from affecting other layers.
What are the 7 layers of the OSI Model.pg30
- Physical 2.Data Link 3. Network 4. Transport 5. Session 6.Presentation 7. Application
What are the upper layers in the OSI. pg31
- Application-provides a user interface
- Presention-presents data, handles processing-encryption
- Session-keeps different applications’ data separate
What are the lower layers in the OSI.pg31
- Transport-provides reliable or unreliable delivery, performs error correction before retransmit
- Network-provides logical addressing,
- Data Link- combines packets into bytes and bytes into frames; provides access to media using MAC address; perform error detection, not correction
- Physical-moves bits between devices; specifies voltage, wire speed, and pin-out of cables
What is Application Layer?pg32
Marks the spot where users actually communicate or interact with the computer.pg32
