OSI 7 Layer Model

#	Layer	Application	Description	Examples
7	Application	Data	Network process to application	DNS, FTP, HTTP, SMTP, Telnet, DHCP
6	Presentation	Data	Data representation & encryption	GIF, JPEG, SSL, MIME
5	Session	Data	Interhost Comms	NetBIOS, Sockets, Named Pipes, RPC
4	Transport	Segments	End-to-end connections and reliablity	TCP, UDP
3	Network	Packets	Path determination and logical addressing	IP, IPSec, ICMP, BGP
2	Datalinks	Frames	Physical addressing	Ethernet, Wifi, WLAN, MAC
1	Physical	Bits	Media, signal, binary transmission	CAT5