Please Whitelist This Site?

I know everyone hates ads. But please understand that I am providing premium content for free that takes hundreds of hours of time to research and write. I don't want to go to a pay-only model like some sites, but when more and more people block ads, I end up working for free. And I have a family to support, just like you. :)

If you like The TCP/IP Guide, please consider the download version. It's priced very economically and you can read all of it in a convenient format without ads.

If you want to use this site for free, I'd be grateful if you could add the site to the whitelist for Adblock. To do so, just open the Adblock menu and select "Disable on tcpipguide.com". Or go to the Tools menu and select "Adblock Plus Preferences...". Then click "Add Filter..." at the bottom, and add this string: "@@||tcpipguide.com^$document". Then just click OK.

Thanks for your understanding!

Sincerely, Charles Kozierok
Author and Publisher, The TCP/IP Guide


NOTE: Using software to mass-download the site degrades the server and is prohibited.
If you want to read The TCP/IP Guide offline, please consider licensing it. Thank you.

The Book is Here... and Now On Sale!

The whole site in one document for easy reference!
The TCP/IP Guide

Custom Search







Table Of Contents  The TCP/IP Guide
 9  The Open System Interconnection (OSI) Reference Model

Previous Topic/Section
Application Layer (Layer 7)
Previous Page
Pages in Current Topic/Section
1
Next Page
OSI Reference Model Layer Summary
Next Topic/Section

OSI Reference Model Layer Mnemonics

If you spend any amount of time at all dealing with networking design or implementation issues, or learning about how the various protocols operate, the names and numbers of the various layers will eventually become “second nature”. Trust me, I know this from experience!

Many people, however, especially those just learning about networks, find it difficult to recall the names of all the layers, and especially, what their exact order is. To help these people, a number of mnemonics (pronounced “neh-MON-iks”—another wonder of the English language) have been created as memory aids. These are cute phrases where each word starts with the first letter of an OSI model layer, arranged in the correct order.


Figure 18: OSI Reference Model Mnemonics

These mnemonics may help you to remember the order of the OSI Reference Model layers.

 


I have seen a few of them in my time, some of which go in ascending layer number order, and some of which go in the other direction. These two go from physical layer to application layer:

  • Please Do Not Throw Sausage Pizza Away

  • Please Do Not Touch Steve's Pet Alligator

And these ones go the other direction (application to physical):

  • All People Seem To Need Data Processing (this is a popular one)

  • All People Standing Totally Naked Don't Perspire (hmm, that's interesting…)

For your convenience, I have illustrated all four of these in Figure 18.

Oh, and here's one I just made up: All People Should Teach Networking Daily Please.

(Well, I like it! J)

 


Previous Topic/Section
Application Layer (Layer 7)
Previous Page
Pages in Current Topic/Section
1
Next Page
OSI Reference Model Layer Summary
Next Topic/Section

If you find The TCP/IP Guide useful, please consider making a small Paypal donation to help the site, using one of the buttons below. You can also donate a custom amount using the far right button (not less than $1 please, or PayPal gets most/all of your money!) In lieu of a larger donation, you may wish to consider purchasing a download license of The TCP/IP Guide. Thanks for your support!
Donate $2
Donate $5
Donate $10
Donate $20
Donate $30
Donate: $



Home - Table Of Contents - Contact Us

The TCP/IP Guide (http://www.TCPIPGuide.com)
Version 3.0 - Version Date: September 20, 2005

© Copyright 2001-2005 Charles M. Kozierok. All Rights Reserved.
Not responsible for any loss resulting from the use of this site.