Term

OSI Model

Definition

A seven-layer conceptual framework developed by ISO that describes how communications should occur in a computer network from physical transmission to application interfaces

Term

Physical Layer (Layer 1)...

Definition

Defines the physical medium and electrical/optical/radio signals used to transmit raw binary data (examples: Ethernet cables WiFi radio bands 2.4GHz/5GHz/6GHz)

Term

Data Link Layer (Layer 2)...

Definition

Defines protocols for reliable data transfer between adjacent nodes on the same network segment using MAC addresses in frames (examples: Ethernet 802.3 WiFi 802.11)