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Lapisan OSI 7 – Application Lapisan OSI 6 - Presentation Lapisan OSI 5 - Session

Lapisan OSI 7 – Application Lapisan OSI 6 - Presentation Lapisan OSI 5 - Session Nyoman Suryadipta , ST, CCNP. Mengenal Definisi & tugas OSI L7 Peran OSI L7 dalam komunikasi client-server Jenis Protokol OSI L7 & Fungsinya Contoh Protokol OSI L7: http, DNS, SMTP, POP3, DHCP.

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Lapisan OSI 7 – Application Lapisan OSI 6 - Presentation Lapisan OSI 5 - Session

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  1. Lapisan OSI 7 – Application Lapisan OSI 6 - Presentation LapisanOSI 5 - Session NyomanSuryadipta, ST, CCNP Nyoman Suryadipta, ST, CCNP - Computer Science Faculty

  2. MengenalDefinisi & tugas OSI L7 • Peran OSI L7 dalamkomunikasi client-server • JenisProtokol OSI L7 & Fungsinya • ContohProtokol OSI L7: http, DNS, SMTP, POP3, DHCP Tujuan Nyoman Suryadipta, ST, CCNP - Computer Science Faculty

  3. IMAP SSH FTP Telnet SMTP OSI L7 DHCP DNS POP3 http https Nyoman Suryadipta, ST, CCNP - Computer Science Faculty

  4. Protokol OSI L7 mengaturjenislayanankomunikasi data & Protokol yang akandigunakan, khususnyaKomunikasi Client-Server di dalamJaringan • KomunikasiJaringanmemilikibanyakjenislayanan, misaluntuklayanan web = http, menerima email = POP3, mengirim email = SMTP, konversinama web ke IP DNS, mengirim file FTP, mendapatkan IP otomatis di area Hotspot = DHCPdanmasihbanyakcontohlainnya Nyoman Suryadipta, ST, CCNP - Computer Science Faculty

  5. Protokoladalah set aturan yang akanmenentukanbagaimana data dikirimdarisumberketujuan • Protokoltersebutbertugasmengawal data yang dikirimsudahsesuaidenganjenislayanan data yang digunakan Nyoman Suryadipta, ST, CCNP - Computer Science Faculty

  6. HTTP (Hypertext Transfer Protocol)akses website • DNS (Domain Name System) : konversinama domain ke IP Address & sebaliknya • SMTP (Simple Mail Transfer Protocol) : pengiriman email • DHCP (Dynamic Host Control Protocol) : Setup IP address otomatiske Client • FTP (File Transfer Protocol) : Transfer File (Upload/Download) DaftarlengkapProtokol OSI L7 : http://en.wikipedia.org/wiki/List_of_network_protocols_(OSI_model) Nyoman Suryadipta, ST, CCNP - Computer Science Faculty

  7. ProtokolKomunikasi OSI L7 Banyakdigunakandalamkomunikasijaringan Client – Server HTTP (WEB) SMTP (EMAIL) DNS (DOMAIN NAME) FTP (DATA TRANSFER)

  8. Server = PelayanyaitusebuahKomputer yang bertugasmelayanipermintaan Client • Jika Server bertugasmelayanipermintaan web makadisebut webserver, jikamelayani email disebutemailserverdst • Sebuah server harusbisamelayanipermintaandaribanyak Client karenafungsinyasebagaipusat data Nyoman Suryadipta, ST, CCNP - Computer Science Faculty

  9. http Hypertext Transfer Protocol Nyoman Suryadipta, ST, CCNP - Computer Science Faculty

  10. http://www.cisco.com CLIENT WEB SERVER http protocol Nyoman Suryadipta, ST, CCNP - Computer Science Faculty

  11. DNS Domain Name System Nyoman Suryadipta, ST, CCNP - Computer Science Faculty

  12. DaftarKontakHandphone :Bertugasmerubahnamamenjadi No HP DNS :Nama website yang andaketikdirubahmenjadi IP Publik http://www.cisco.com 202.154.1.2 DNS SERVER CLIENT WEB SERVER Nyoman Suryadipta, ST, CCNP - Computer Science Faculty

  13. KomunikasiAntarKomputer di Jaringan Internet menggunakanAlamat IP Publik PenggunaanNamahanyauntukmempermudahManusia SamahalnyadengankomunikasiantarperangkatSelulermenggunakanangka BayangkanJikamenggunakannamasebagaiidentitaspengenalperangkatsangatrentanterjadiduplikat / nama yang sama Why We Need DNS ? Nyoman Suryadipta, ST, CCNP - Computer Science Faculty

  14. Setup DNS Client PC Nyoman Suryadipta, ST, CCNP - Computer Science Faculty

  15. Dibangunsendiridanditempatkan di jaringanlokalperusahaan • Dikelola ISP (Penyedialayanan internet) – jikaberlangganan internet tidakperlumembangun DNS Server sendiritetapibisa “nunut” DNS milik ISP Where is DNS Server ? Nyoman Suryadipta, ST, CCNP - Computer Science Faculty

  16. Publik DNS DikelolaPenyedialayanan Web, misal DNS Server milik Google di alamat 8.8.8.8 & 8.8.4.4 • Root DNS : Intiataujantungdari DNS Server Duniadengan database paling lengkap Where is DNS Server ? Nyoman Suryadipta, ST, CCNP - Computer Science Faculty

  17. Root DNS Open DNS ISP DNS Level Privat / Lokal Nyoman Suryadipta, ST, CCNP - Computer Science Faculty

  18. http://www.iana.org/domains/root/servers 13 DNS Root Server Nyoman Suryadipta, ST, CCNP - Computer Science Faculty

  19. http://www.root-servers.org/ 130 DNS Server Mirror (duplikat Root DNS) Nyoman Suryadipta, ST, CCNP - Computer Science Faculty

  20. http://www.root-servers.org/ Indonesia DNS Root Server Mirror Nyoman Suryadipta, ST, CCNP - Computer Science Faculty

  21. SMTP & POP3 Simple Mail Transfer Protocol Post Office Protocol v3 Nyoman Suryadipta, ST, CCNP - Computer Science Faculty

  22. SMTP : meneruskanpengiriman email ke mail server tujuan From : ari@kampus.ac.id To : danu@gmail.com To : danu@gmail.com SMTP SERVER mail.kampus.ac.id CLIENT Gmail Server Nyoman Suryadipta, ST, CCNP - Computer Science Faculty

  23. POP3: Menarik inbox email dari server ke Client to: ari@kampus.ac.id From : danu@gmail.com to: ari@kampus.ac.id POP3 SERVER mail.kampus.ac.id CLIENT Gmail Server Nyoman Suryadipta, ST, CCNP - Computer Science Faculty

  24. DHCP Dynamic Host Control Protocol Nyoman Suryadipta, ST, CCNP - Computer Science Faculty

  25. MetodepemberianAlamat IP, Subnet mask, Gateway dan DNS secaraotomatisdari server ke Client • Contoh : Saatkitaterhubungkesebuah Hotspot (access point) secaraotomatiskitamendapatkankonfigurasi IP lengkaptanpaharusmemasukkansecara manual DHCP Nyoman Suryadipta, ST, CCNP - Computer Science Faculty

  26. DHCP Server DHCP Nyoman Suryadipta, ST, CCNP - Computer Science Faculty

  27. Example Devices support DHCP : • Server PC (Linux/Windows OS) • Switch • Router • Firewall DHCP Nyoman Suryadipta, ST, CCNP - Computer Science Faculty

  28. Memastikan Proses pengkodean (Format/Ekstensi data) & KonversidariLapisanAplikasi agar dapatdibacadisisiTujuan / Penerima • Kompresi data agar di sisipenerimadapatdilakukan de-kompresi • MelakukanEnkripsisebelumditransmisikandandekripsi di sisiPenerima Sample : Motion Picture Experts Group (MPEG), Graphics Interchange Format (GIF), Joint Photographic Experts Group (JPEG), and Tagged Image File Format (TIFF) dsb LapisanPresentasi (OSI ke-6)

  29. Sesuainamanya, tugasutamaadalahmembuat, mengeloladanmengakhiriSesikomunikasiantarAplikasisisiPengirim & Penerima • Aplikasi yang dimaksuddisiniadalahAplikasilapisanketujuh yang berhubungandenganJaringan • Aplikasiseperti web browsers atau email client melibatkan proses Dari lapisan 7,6 dan 5 LapisanSesi (OSI ke-5)

  30. Thank You Nyoman Suryadipta, ST, CCNP - Computer Science Faculty

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