Jnc Mod 1 - Lesson 3

Front 1

What is the purpose of the OSI Model?

Back 1

OSI reference model is a means of describing how data is transmitted over a network, and the model addresses hardware, software and data transmission.

Hint 1

The OSI Reference Model 1-28

Front 2

What are the 7 layers of the OSI model?

Back 2

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

Hint 2

All People Seem To Need Data Processing

<A.P.S.T.N.D.P. Acronym>

Front 3

What is the FUNCTION of layer 1 in the OSI Model?

Back 3

Binary Transmission:
-Defines the electrical, mechanical, procedural and functional specification for activating maintaining and deactivating the physical link.

Hint 3

Physical Level

Front 4

What is the FUNCTION of layer 2 in the OSI model?

Back 4

Access to Media:
-Defines how data is formatted for transmission and how access to the network is controlled.
-It also provides ERROR DETECTION.

Hint 4

Data Link Level

Front 5

What is the FUNCTION of layer 3 in the OSI model?

Back 5

Data Delivery:
-Routes Data Packets
-Selects best path to deliver data
-Provides logical addressing and path selection

Hint 5

Network Level

Front 6

What is the FUNCTION of layer 4 in the OSI model?

Back 6

End-to-End Connections:
-Handles transportation issues between hosts (computers)
-Ensures data transport reliability.
-Established, maintains and terminates virtual circuits.
-Fault detection and recovery information flow control.

Hint 6

Transport Level

Front 7

What is the boundary between the Transport level and Session level of the OSI model thought of?

Back 7

The boundary between application protocols and data-flow protocols.

Hint 7

<no hint here>

Front 8

What is the FUNCTION of layer 5 in the OSI model?

Back 8

Interhost Communication:
-Establishes, manages and terminates sessions between applications.

Hint 8

Session Level

Front 9

What is the FUNCION of layer 6 in the OSI model?

Back 9

Data Representation:
-Ensures data is readable by receiving host
-Formats data
-Structures data
-Negotiates data transfer syntax for application level
-Provides encryption

Hint 9

Presentation Level

Front 10

What is the FUNCTION of layer 7 in the OSI model?

Back 10

Network Processes to Applications
-Provides network services to application processes (email, file transfers, terminal emulation)
-Provides user authentication

Hint 10

Application Level

Front 11

What is Encapsulation?

Back 11

Encapsulation wraps data with the necessary protocol information before network transit.

Hint 11

Level 7 to 1 of OSI model. Data Flow.

Front 12

What is De-Encapsulation?

Back 12

Receiving host receives a sequince of bits, the physical layer passes the bits to data link for manipulation.
Translates the protocol from the sending unit (encapsulation)

Hint 12

Reverse Encapsulation

Front 13

What is Peer-to-Peer communication?

Back 13

Each level of the OSI model talks directly from sending host to receiving host on a level to level basis. (sending host Transport talks to receiving host Transport)

Hint 13

Person to Person style...

Front 14

What are Network Protocols?

Back 14

Network Protocols are sets of rules and standards that tell the services of a network what to do. Each has its own function and operation at different layers of the OSI model.

Hint 14

Laws of Network Protocol

Front 15

What defines the network functions that occur at each layer and ficilitates an understanding of how information travels thrughout a network?

Back 15

The OSI reference model

Hint 15

Purpose of topic.