OSI Model (OSI/RM)

**OSI Model (OSI/RM) Study Sheet**
TCP/IP Stack	OSI Model (OSI/RM) References to James Bond Meets The 7 Layer OSI Model are italicized	Protocols & Hardware
TCP/IP stack layer 4 Application Maps to OSI model layer 7 Application, OSI model layer 6 Presentation & (according to some) OSI model layer 5 Session	OSI model layer 7 Application Bond receives message from No. 1	FTP (21), SMTP (25) DNS (53), HTTP (80), POP3 (110), NNTP (119), SMB, TFTP, SNMP, BOOTP, DHCP, Telnet, Gopher NCP
	OSI model layer 6 Presentation Message translated, compressed & encrypted	Gateway server (sometimes said to operate on all 7 layers of the OSI model)
	OSI model layer 5 Session Security checks for message completeness	NetBIOS
TCP/IP stack layer 3 Transport Maps to OSI model layer 4 Transport & (according to some) OSI model layer 5 Session	OSI model layer 4 Transport Message broken into smaller packages, combined with others	TCP, UDP SPX NWLink, NetBEUI AppleTalk Layer 4 Switch
TCP/IP stack layer 2 Internet Maps to OSI model layer 3 Network	OSI model layer 3 Network Bond advised on fastest route	IP, ICMP, EGMP, ARP, RARP RIP, OSPF, EGP, BGP IPX, SAP, NLSP NWLink, NetBEUI AppleTalk Router, Brouter, Routing Switch
TCP/IP stack layer 1 Network Access Maps to OSI model layer 2 Data Link & OSI model layer 1 Physical	OSI model layer 2 Data Link (divided into LLC [top] & MAC [bottom]) Messages placed in special pouch	IEEE 802.3 Ethernet, IEEE 802.5 TokenRing, X.25, FDDI, ATM LocalTalk Modem, NIC, Bridge, Brouter, LAN Switch
	OSI model layer 1 Physical Bond gets into his Aston Martin	Cable, Hub, Repeater, Switching Hub, CSU/DSU, Patch Panel
	"All People Seem To Need Data Processing" "Please Do Not Throw Sausage Pizza Away"	TCP/IP protocols in green (port numbers in parentheses) Other protocols used by Microsoft in black Novell protocols in red Apple protocols in pink Routing protocols in gray highlight LAN & WAN protocols in blue highlight Hardware in underlined hyperlink; click for images

Return to channelZ.org's OSI Model home page.