1.1 - Understanding the OSI Model

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

OSI model

Reference model used to describe the process of data traversing networks.

Acronym for the OSI model

All People Seem To Need Data Processing

Layer 7

Application layer; where user interacts with applications (e.g., HTTP, FTP).

Layer 6

Presentation layer; responsible for data format, encryption, and character encoding.

Layer 5

Session layer; manages communication sessions between devices.

Layer 4

Transport layer; transports data between devices using protocols like TCP and UDP.

Layer 3

Network layer; routes data based on IP addresses.

Layer 2

Data link layer; facilitates communication between devices using MAC addresses.

Layer 1

Physical layer; concerned with the physical transmission of data over network cables and wireless signals.

MAC address

A hardware address used on the data link layer.

TCP

A protocol in the transport layer that ensures reliable data transmission at the expense of speed.

UDP

A connectionless protocol in the transport layer for sending data - sends packets in bulk at the expense of reliability.

Network Switch

A device that operates at the data link layer to forward traffic based on MAC addresses.

Router

A device that operates at the network layer to forward traffic based on IP addresses.

Wireshark

A network protocol analyzer used to capture and view data on a network.

SSL

A protocol for encrypting data over the internet.

TLS

A protocol for securing communications over a computer network.