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), Telnet (23), SMTP (25), DNS (53), DHCP (67, 68), HTTP (80), POP3 (110), NNTP (119), NTP (123), SMB, TFTP, SNMP, BOOTP, Gopher

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
IPX
RIP, OSPF, IGRP, EIGRP, EGP, BGP
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 hardware protocols in blue highlight
Hardware in underlined hyperlink; click for images

© 2002–2009, Jeff Zahorowski. All rights reserved

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