OSI is a protocol which is used by international networking standard. This protocol is more reliable than TCP/IP. But if learn the theory it's more complicated. 7 layer OSI could be known as "
Please Do Not Throw Sausage Pizza Away" or "
All People Seems To Need Data Process". It's easy to remind right? Now, i'll give you some explanation and it's function. Check this!
| Layer | Function | Example |
| Application | as interface application within network functionality and manage how could the application access the network then makes error message | NNTP, SIP, DHCP, FTP, Gopher, HTTP, NFS, SNMP, Telnet, POP3 |
| Presentation | translating, data encryption, and data compress | ASCII, Midi, MPEG |
| Session | Define how the connection established, running or disconnected | SQL, x-Window, ZIP, NetBIOS, ASP, RPC, NFS |
| Transport | do arrangement, divided big data into small packet and authorize connection from several network | TCP, SPx, UDP, IPx |
| Network | route the data from source to destination through transmission exact LAN MAN WAN | IPx, IP, ICMP, ARP, RARP, IGRP,BGP, OSPK |
| Data Link | the bridge between network media and protocol layer. authorize the last binary data packet which is derived from highest level into a discrite packet before going to physical layer | 802.3 [ethernet], 802.11 a/b/g/n, Mac, FDDI, Frame relay, SDLC, PPP, Token ring |
| Physical | define communication media, voltage, flexible so that it can integrate several different network and physical media | RS 232, 10 Base T, 100 Base Tx, DSL |
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