TCP/IP and OSI Models Computer Skills 2024/2025

TCP/IP and OSI Models Computer Skills 2024/2025
OSI model - A standard set by ISO that provides granularity of networking assignments within the model.



TCP/IP model - Developed by the Department of Defense (DoD) and covers the same networking aspects
as the OSI model, but in fewer layers.



protocols - Sets of rules that govern the behavior of communication between devices.



data units - The smallest piece of information that can be transmitted in a network.



devices - Physical or virtual components that are part of a network.



network - The OSI layer related to the function of the IP protocol suite.



data link - The OSI layer responsible for organizing how bits are passed over the physical layer between
devices within the same collision domain.



transport layer - The OSI layer that ensures packets of data are received correctly and resends them if
they are not.



TCP - A protocol that performs functions of OSI layer 4.



UDP - A protocol that performs functions of OSI layer 4.



Application layer - The top layer of the TCP/IP model that contains message and supports network
applications.