the cambridge dictionary defines hierarchy as:
a system in which people or things are arranged according to their importance
we know that the OSI model is hierachical
application
presentation
session
transport
network
datalink
physical
there is an order to this, and rules which govern this order
so too with a network
a network hierarchy is a system defined by traffic rules and criteria set forth to govern its flow from one layer to the next
network cisco ccna gns3 certification arteq
a network runs through it
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