The three layers of the OSI standard are application layer, transportation and Network layer. Network layer provides the electrical and mechanical interface to network medium, network layer handles routing and forwarding of data. The transport layer ensures data is successfully sent and received between two nodes..
The three layers of an artery are Endothelium, smooth muscle, and connective tissue.
One wold not describe the anatomy of an Earthworm in terms of "layers". For this reason we do not understand what you are asking.
Its Three. Which are: Physical, Data Link and Network Layers
You have three layers of heart. Outer is pericardium. Middle is myocardium. Inner is endocardium. The middle layer function in blood pumping, mainly.
There is no single standard that defines just the first three layers of the OSI model. The OSI model itself is not a single standard either, but a combination of multiple standards. The answer you are looking for however, is the X.25 standard for data transmission used in packet switching networks.
what are the three layers of the forest
three....length, mass, and time
Three Layers
The three layers are the retina, sclera, and the choroid.
what are the three layers of a vein
The bed has three layers.
-Protect the central nervous system -Responsible for nourshing the brain -Provides cushioning effect for the CNS -Support the large venous channels carrying blood from the brain toward the heart