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Lab 3 OSI Model

March 3, 2013

Layer #

Layer Name

Mnemonic

Keywords & Description of Function

7

 Application

 Away

 datagrams, software layer,
network aware programs:
FTP, HTTP, email

6

 Presentation

 Pizza

 datagrams, software layer,
controls context between
application layer and lower
layers by using different
syntax and symantics

5

 Session

 Sausage

 datagrams, controls the
dialogue between computers,
software layer

4

 Transport

 Throw

 organizes packets into
segments, TCP – reliable,
helps network layer make
sure information is delivered
to the right location

3

 Network

 Not

 Intelligent layer, routers on
this level, organizes frames
into packets, IP – not reliable

2

 Data link

 Do

 Organizes bits into frames,
switches and bridges at this
level, some intelligence

1

 Physical

 Please

 Sends information in bits, hubs
& repeaters at this level, no
intelligence

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