JS NET+ CH2

Question 1

What is (OSI) and why was it created?pg28

Answer 1

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

Question 2

What is the blueprint of how communications should take place?pg29

Answer 2

Reference model.

Question 3

Effective communication is processed and divided in to groups called ____?pg29

Answer 3

Layers. If the system is made this way it is known as Layered Architecture.pg29

Question 4

Different protocols will be in place to meet the different layers needs is called___?pg29

Answer 4

Binding pg29

Question 5

What are advantages to using the OSI layered model?pg29

Answer 5

1. Divides network communication processes into smaller and simpler components,
2. Allows multiple-vendor development.
3. Encourages industry standardization
4. Allows various types of network hardware and software to communicate
5. Prevents changes in one layer from affecting other layers.

Question 6

What are the 7 layers of the OSI Model.pg30

Answer 6

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

Question 7

What are the upper layers in the OSI. pg31

Answer 7

7. Application-provides a user interface
8. Presention-presents data, handles processing-encryption
9. Session-keeps different applications’ data separate

Question 8

What are the lower layers in the OSI.pg31

Answer 8

4. Transport-provides reliable or unreliable delivery, performs error correction before retransmit
5. Network-provides logical addressing,
6. Data Link- combines packets into bytes and bytes into frames; provides access to media using MAC address; perform error detection, not correction
7. Physical-moves bits between devices; specifies voltage, wire speed, and pin-out of cables

Question 9

What is Application Layer?pg32

Answer 9

Marks the spot where users actually communicate or interact with the computer.pg32