Networking Concepts and OSI Model

Front

Open Systems Interconnection (OSI) model

Back

A seven-layer hierarchical model developed to enable different networks to communicate reliably between disparate systems.

Front

Encapsulation

Back

The process of encoding data as it goes down the OSI stack.

Front

Modulation Techniques

Back

The process of varying one or more properties of a waveform with a signal containing information to be transmitted.

Front

Layer 1 – Physical

Back

Responsible for taking 1s and 0s and encoding them into a digital signal for transmission on the network segment.

Front

Layer 2 – Data link

Back

Provides framing and placing of data on the network medium, using MAC addresses.

Front

Layer 3 – Network

Back

Manages logical device addressing and determines the best way to move data.

Front

Layer 4 – Transport

Back

Provides segmentation, sequencing, and virtual circuits for reliable connections.

Front

Layer 5 – Session

Back

Responsible for communicating from a user interface to an application.

Front

Layer 6 – Presentation

Back

Responsible for communicating from a user interface to an application.

Front

Layer 7 – Application

Back

Responsible for communicating from a user interface to an application.