pengantar komdat
TRANSCRIPT
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Pengantar Komunikasi Data
Basiroh, S. Kom, M. Kom
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Pengantar Komunikasi Data Tugas dasar sistem komunikasi menjalankan
pertukaran data antara 2 pihak
Elemen-elemen model komunikasi sederhana :
Source (sumber)
Transmitter (Pengirim)
Transmission System (Sistem Transmisi)
Receiver (Penerima)
Desnitation (Tujuan)
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Model Komunikasi Sederhana
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Tugas Sistem Komunikasi Data
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Protokol dan Arsitektur Protokol Model pendekatan entiti dan sistem
Entiti : program-program aplikasi user, program transfer file, program email, program web
Sistem : komputer
Protokol dipergunakan untuk proses komunikasidiantara entiti pada sistem
Sistem
entiti
Protokol
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Definisi Protokol Protokol : Rangkaian aturan yg yg membawahi proses
pertukaran data antar 2 entiti
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Arsitektur Protokol Studi kasus transfer file antara sumber dan tujuan,
terdapat tugas-tugas yg harus ada :
1. Menginformasikan identitas sistem tujuan
2. Sistem tujuan siap menerima data
3. Program pada sistem tujuan telah siap
Dianjurkan cara fasilitas transfer file dapatdiaplikasikan konsep lapisan modul
Modul aplikasi transfer file (file transfer aplicationmodule)
Modul layanan komunikasi (communications service module)
Modul akses jaringan ( network access module)
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Arsitektur ProtokolTugas 3
Tugas 2
Tugas 1
Tiap lapisan saling bekerja sama
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Arsitektur Protokol
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Arsitektur Protokol Model Tigas Lapisan (Three Layer Model)
Model TCP/IP
Model OSI
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Three Layer Model
Tiga lapisan dalam Three Layer Model adalah :
• Lapisan Aplikasi(Application Layer)
• Lapisan Transport (Transport Layer)
• Lapisan Akses Jaringan(Network Accress Module
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Fungsi Tiap Lapisan Lapisan Aplikasi :
Memberikan fasilitas (aplikasi) yang diinginkan user
Misal : email, web, transfer file
Lapisan Transport :
Memastikan data benar-benar tiba pada aplikasi tujuan
Relibilitas pengiriman data
Lapisan Akses Jaringan :
Rute paket dari sumber sampai tujuan
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Modul-modul berkomunikasimenggunakan protokol
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2 Level PengalamatanSAP dan Network Address
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Sap 2 Kom X Sap 1 Kom Z
Komp X
Komp Z
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Protocol Data Unit (PDU)
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Header Transport Destination SAP
Sequence Number
Error-Detection Code
Header NetworkDestination Computer Address
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Definisi TCP / IP Sekumpulan aturan (standar) yg menentukan bagaimana
komputer harus berkomunikasi, bagaimana berbagaikomponen software dan hardware yg berbeda-beda harusberinteraksi Your Browser and Your Server Use TCP/IP
Your E-Mail Uses TCP/IP
Your Internet Address is TCP/IP
Ping
TCP dan IP sendiri masing-masing merupakan protokol TCP (Transmission Control Protocol)
IP (Internet Protocol)
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Lapisan TCP/IP, Fungsinya danKonsep
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