OSI Model Table

Since I am in the throws of recertifying my CompTIA Security+ status, I decided to post my review of the OSI model. This information is all pretty easy to find, however I wanted make sure I tied together not only the layers but the technologies that are apart of each layer when possible.

Layer	Name	Unit	Examples	Description
L1	Physical	bit	wire,fibre	Layer 1 is the physical medium of data transfer, most commonly copper, fibre, or airwaves by todays standards.
L2	Data-Link	frame	switch/hub,NIC,MAC address	Layer 2 facilitates data transfer over physical medium between devices on the same network/LAN, commonly referred to as switching
L3	Network	packet	router/gateway,Internet Protocol(IP)	Layer 3 facilitates data transfer between different IP networks or LANs, commonly known as routing...
L4	Transport	TCP Segments/UDP datagrams	Transmisson Control and User Datagram Protocols (TCP/UDP)	Layer 4 is responsible for maintainig the end-to-end virtual circuits created between devices when sending or receiving data
L5	Session	Messages	SQL,SSL	Layer 5 maintains the unique sessions and certificates created between applications moving up and down the stack
L6	Presentation	Messages	encryption,compression	Layer 6 translates and formats data into whatever form the next layer requires, be that up to Application at the end of transmission, or down to Session at the beginning...
L7	Application	Messages	email,FTP,SSH	Layer 7 is where message creation begins or ends, depending on whether one is a sender or receiver of a message.

References:
http://www.howtonetwork.org/design/ccda/chapter-1-network-fundamentals
CompTIA Security+ SY0-401 3rd Edition, ISBN-13: 978-0-7897-5333-5