4A Flashcards
What does “OSI” stand for?
Open Systems Interconnection
What does OSI explain?
How different components of a network work together.
What does “ISO” stand for?
International Organization for Standardization
ISO is responsible for developing OSI in what year?
in the 1970s
The OSI model is also referred to as?
OSI reference model
What is the OSI model?
It is a conceptual framework that defines networking to implement protocols in seven layers.
What are layers 1-4 in the OSI model?
Layers 1-4 are considered the lower layers, and mostly concern themselves with moving data around.
What are layers 5-7 in the OSI model?
Layers 5-7, called the upper layers, contain application-level data.
Networks operate on one basic principle, which is?
“pass it on.” Each layer takes care of a very specific job, and then
passes the data onto the next layer.
The OSI model takes the task of inter-networking and divides that up into what is referred to as…?
a vertical stack that consists of the 7 layers
Which layer is at the top of the OSI model?
Layer 7 - Application Layer
Which layer is at the bottom of the OSI model?
Layer 1 - Physical Layer
