Network+ Module 2 - OSI Model

This set of flashcards covers the key concepts and terminology related to the OSI model and its layers.

OSI Model

A set standard describing how information in one computer moves through a network to reach software on another.

Physical Layer

With regards to OSI, this is the first layer that deals with raw bits transmission through physical media.

Data Link Layer

With regards to OSI, this is the second layer responsible for organizing raw bits into frames.

Frames

Formatted raw data that includes headers and trailers for local network transfer.

MAC Address

A static address that identifies a hardware device on a network.

Network Layer

With regards to OSI, this is the third layer that routes frames across different networks using IP addresses.

Packets

Smaller chunks of data for transmission across networks.

Transport Layer

With regards to OSI, this is the fourth layer that provides end-to-end data transfer using TCP or UDP.

TCP

Transmission Control Protocol, ensures reliable data transfer with acknowledgements.

UDP

User Datagram Protocol, a faster but less reliable data transfer method.

Session Layer / Traffic Cop

With regards to OSI, this is the fifth layer that manages communication sessions between applications.

Presentation Layer

The sixth layer responsible for translating data into readable format and data handling.

Application Layer

With regards to OSI, this is the top layer that interfaces directly with the end user, includes web browsers and email.