OSI Model

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10 Terms

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OSI Model

7 layers. (APSTNDP)

7.APPLICATION

6-PRESENTATION

5-SESSION

4-TRANSPOR

3-NETWORK

2-DATA LINK

1-PHYSICAL

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Application

interacts with end user. Includes programs on a computer that interact with a network.

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Presentation

it’s the coding of data. Includes file formats and character presentation.

******ENCRYPTION TAKES PLACE IN THIS LAYER****

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Session

maintains communication sessions between computers. Creates, maintains and disconnects communications that take place between processes over the network.

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Transport

Breaks data into packets and properly transmits them over the network.

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Network

Logical implementation of the network.

****LOGICAL ADDRESSING***

IN TCP/IP networking, logical addressing takes the familiar form of IP address.

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Data Link

responsible for TRANSMITTING INFORMATION on computers connected to the same LAN.

***USES MAC ADDRESSES***

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Physical

Must translate the binary ones and zeros of computer language into the language of the transport medium.

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Copper network cables

it must translate computer data into ELECTRICAL IMPULSES

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Fiber optics

must translate the data into bursts of light