di mana jika diilustrasikan dalam contoh proses transmisi data pengiriman dan penerimaan email, dapat digambarkan, sebagai berikut (beserta dengan contoh perangkat/unit (hardware devices) dan tipe protocol yang digunakan pada setiap layer):
SENDER
ADP Machine
Layer 7 - ApplicationLayer 6 - Presentation
Layer 5 - SessionLayer 4 - TransportLayer 3 - NetworkLayer 2 - Data LinkLayer 1 - Physical
Keep track of how many
E-mail sent from
Identify sender and
Is the initial connection
Encode data with X
Initiate and terminate thehops;Send as electrical signal John:
intended receiver; is there
Make sure all data is sentset up? Put data into
coding key; use ASCII
session according to Xopen shortest path First;over the network cable at Meet me at Carl's
an e-mail application
intact.frames according to X
characters.
protocol.Go to IP addressX voltage, and X Mbps. 1:30 (John)
available?
standard.
255.65.0.123
Routers, Layer 3 (or IP)
Bridges and switches, Hubs, repeaters, network Devices
GatewayFirewallswitches/multilayer
ethernet*, access pointadapter (NIC), cable switches
SNMP, SMTP, FTP,
Firewall, NetBEUI, TCP, IP, PIX, NWlink, NetBEUI,
Protocols
NCP, AFP, TDI
NetBIOSEthernet, Wi-Fi, PPP, etcCAT 5, RJ-45, etc HTTP, etc
SPX, Nwlink, UDPICMP
RECEIVER
ADP Machine
Layer 7 - ApplicationLayer 6 - Presentation
Layer 5 - SessionLayer 4 - TransportLayer 3 - NetworkLayer 2 - Data LinkLayer 1 - Physical
Keep track of how many
E-mail received from
hops;The initial connection set
Identified sender andDecoded data with X
Initiated and terminatedReceive electrical signal John:
Make sure all data has opened the shortest path up. Decoded data in
intended receiver; found e- decoding key; used ASCII
the session according toover the network cable at Meet me at Carl's
arrived intact.First;frame according to X
mail application.characters.
X protocol.X voltage, and X Mbps. 1:30 (John)
Went to IP addressstandard.
255.65.0.123
Routers, Layer 3 (or IP)
Bridges and switches, Hubs, repeaters, network Devices
GatewayFirewallswitches/multilayer
ethernet*, access pointadapter (NIC), cable switches
SNMP, SMTP, FTP,
Firewall, NetBEUI, TCP, IP, PIX, NWlink, NetBEUI,
Protocols
NCP, AFP, TDI
NetBIOSEthernet, Wi-Fi, PPP, etcCAT 5, RJ-45, etc HTTP, etc
SPX, Nwlink, UDPICMP
bahwa dengan menggunakan referensi di atas, proses transmisi data yang berlangsung dapat diuraikan secara singkat, sebagai berikut:
a. bahwa sebagaimana yang telah diuraikan sebelumnya, hal utama dan terutama yang harus dipahami dan disepakati adalah bahwa OSI Model merupakan referensi yang berisi cara kerja transmisi data / internet protocol dalam sebuah jaringan komputer;
bahwa jaringan komputer atau computer network dapat didefinisikan sebagai sebuah jaringan yang terdiri dari “two or more computers that are connected – either by cables (wired) or WiFi (wireless) – with the purpose of transmitting, exchanging, or sharing data and resources. You build a computer network using hardware (e.g., Routers, Switches, access points, and cables) and software (e.g., operating systems or business applications)”;
b. bahwa dalam OSI Model, proses transmisi data dilakukan secara bertahap yang jika dilihat mulai dari sisi pengirim, dimulai dari Layer Application (Layer 7) sampai dengan layer paling bawah, yaitu Layer Physical. Ketika data tersebut tiba pada sisi penerima, akan ada lagi proses penerimaan pada sisi penerima, dimulai dari Layer Physical sampai dengan Layer Application;
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