02. komdat - model jaringan

7/24/2019 02. KomDat - Model Jaringan

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Komunikasi Data (TEU 611)

Network Models

Dr. I Wayan Mustika, ST., M.Eng.

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Outline!The Open System Interconnection (OSI) Model

!Layers in The OSI Model

!

Layered Task in The OSI Model!TCP/IP Protocol Suite

!Addressing in TCP/IP Protocol


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Layered Task" The concept of layeris used in our daily life

" What is the example?

" This concept becomes a general idea of thelayer of a network


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Analogy of Layer in Our Daily Life


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The OSI Model" Open System Interconnection (OSI) model is an

ISO standard that covers all aspects of networkcommunication

"

Purpose: to show how to facilitatecommunication between different systemswithout requiring changes to the logic ofunderlying hardware and software

"

It is a model for understanding and designing anetwork architecture that is flexible, robust, andinteroperable


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Seven Layers of the OSI Model


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The Interaction between Layers


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An Information Exchange using the

OSI Model


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Layer 1: Physical Layer


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Physical Layer" Responsible for movements of individual bits

from one hop (node) to the next

Physical characteristics of interfaces and medium Representation of bits

Data rate

Synchronization of bits

Line configuration

Physical topology

Transmission mode


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Layer 2: Data Link Layer


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Data Link Layer" Responsible for moving frames from one hop

(node) to the next

Framing Physical addressing

Flow control

Error control

Access control


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Hop-to-hop delivery


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Layer 3: Network Layer


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Network Layer

Responsible for the delivery of individual packets

from the source host to the destination host

"

Logical addressing"

Routing


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Source-to-destination delivery


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Layer 4: Transport Layer


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Transport Layer

Responsible for the delivery of a message from

one process to another

"

Service-point addressing (port addess)"

Segmentation and reassembly

" Connection control

" Flow control

"

Error control


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Reliable process-to-process delivery


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Layer 5: Session Layer"

Responsible for dialog control and synchronization


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Layer 6: Presentation Layer" Responsible for translation, compression, and

encryption


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Layer 7: Application Layer" Responsible for providing services to the user


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Summary of Layers


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TCP/IP Protocol Suite


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Addressing


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Physical Address


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Physical Address


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Logical Address


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Port Address


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Port Address

A port address is a 16-bit address (ranging from

1 to 65535) represented by one decimal number

80

A 16-bit port address represented

as one single number.


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The physical addresses change from hop to hop,

but the logical and port addresses usually remain the

same.


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Assignment

Translation, encryption, and compression are

some of the duties of the presentation layer in

the OSI model. Which layer do you think isresponsible for these duties in the Internet

model? Explain your answer

02. komdat - model jaringan

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