Filetype Power Point PPTX | Posted on 02 Sep 2022 | 4 years ago
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340x Filetype PPTX File size 2.81 MB Source: summerschool.fitb.itb.ac.id
When Communication is simple
Example 1
• The communication is so simple that it can
occur in only one layer
(sign language)
Speak Spanish Speak English
When Communication is not simple
Example 2
• Ann has to move to another town because of her job
• We need three layers
• It is hierarchical (the tasks must be done in the order given in the hierarchy)
• Each layer uses the services of the layer immediately below it
• Each layer gives the services to the layer immediately above it
• Before 1990 everyone
believed that the OSI
model would become the
ultimate standard for
data communications -
but this did not happen
• The TCP/IP protocol suite became the dominant
commercial architecture because it was used
and tested extensively in the Internet
– the OSI model was never fully implemented
THE OSI MODEL
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