OSI model

GrahamUK33

Is it me or is anyone else finding it very difficult to remember the OSI model.

Zartanasaurus

Please Do Not Throw Sausage Pizza Away.

Tackle

Zartanasaurus wrote: »

Please Do Not Throw Sausage Pizza Away.

Exactly. Have had that remembererd since I took a Cisco class during high school. Probably because I love pizza.

/fatty

Sykk

I changed it!

Please do not throw salami pizza away.. Guess because you can't really get sausages on a pizza

Tfoote01

All People seem to need data processing...

Zartanasaurus

Sykk wrote: »

I changed it!

Please do not throw salami pizza away.. Guess because you can't really get sausages on a pizza

Must be an Ireland thing. We get sausage on pizzas here in the states.

cyberguypr

Tfoote01 wrote: »

All People seem to need data processing...

This one is embedded in my brain along with PEMDAS (order of math operations).

QHalo

cyberguypr wrote: »

This one is embedded in my brain along with PEMDAS (order of math operations).

Please Excuse My Dear Aunt Sally is what I was taught

And I use All People Seem To Need Data Processing as well

billyr

All Pu**ies Seem To Need Deep Penetration.

For some reason I've never forgotten that one.

some guy

Zartanasaurus wrote: »

Please Do Not Throw Sausage Pizza Away.

THIS!!! +1 | I much prefer it over the "All People Seem To Need Data Processing" because the pizza one goes in order with the layer numbers.

1. Please - Physical
2. Do - Data Link
3. Not - Network
4. Throw - Transport
5. Sausage - Session
6. Pizza - Presentation
7. Away - Application

hbbnt

if you become more familiar with the osi you won't need a mnemonic to remember it. focus on what each layer is and not just their title

some guy

hbbnt wrote: »

if you become more familiar with the osi you won't need a mnemonic to remember it. focus on what each layer is and not just their title

This is very true too. Don't memorize an OSI mnemonic without knowing what each layer does, especially if you want to go the Cisco route. After all, knowing the names of the OSI layers probably won't help much when configuring a real router or switch, if you don't know what each OSI layer does and how they interact.

petemn79

Zartanasaurus wrote: »

Please Do Not Throw Sausage Pizza Away.

When I was in college, my prof used:

Programmers Do Not Throw Sausage Pizza Away.

Zartanasaurus

cyberguypr wrote: »

This one is embedded in my brain along with PEMDAS (order of math operations).

King Phillip Came Over for Group *** was always my favorite. No longer valid since they added domain to the taxonomy.

onesaint

I took my associations a bit further.

B1 (bomber) | bits layer 1
F2 (KB bios key sometimes) | frames layer 2
P3 (Intel processor) | Packets layer 3
S4 (audi sports car) | segments layer 4
D5 -- who know its all data from here down.

elad123

All People Seem to Need Dominos Pizza

demonfurbie

apst|ndp

bigmantenor

Once you start thinking about what each layer is doing when traffic is created/sent on the network, you should not need a mnemonic to remember where everything is. You will begin to understand where everything is in relation to everything else.

quinnyfly

I noticed that another thread cited what people doing the Network+ had the most difficulty with, seemingly many reported that knowing and remembering the OSI (Open Systems Interconnection) was one of the biggest hurdles. Because it is a conceptual model and you don't necessarily see it in action, you no doubt have to build an image in your mind of what it is actually doing at various stages of communication. To help others and especially those undertaking the Network + I have compiled a simple table that elicits the main functions of the OSI. There are 7 layers to the OSI and the Data Link layer (layer 2) incorporates two sub-layers which you should know for the exam. These two layers are the LLC (Logical Link Control) and the MAC (Media Access Control).

First of all, using the tried and tested mneumonic going down through the model <before transmission> it is easily remembered like this:


All .............................................Application layer
People........................................Presentation layer
Seem.........................................Session layer
To..............................................Transport layer
Need..........................................Network layer
Data...........................................Data link layer
Processing...................................Physical layer

Network packets are assembled and data is encapsulated as it travels down throuhg the model before transmission across the medium. They are then decapsulated upon arrival at the destination.

Once the packet leaves the transmission source it is sent to the destination in the form of bits <ones and zeros> to then be reassembled at the receiving end as it goes up through the model in the reverse order.
Going up through the model remember this mneumonic:

Please........................................Physical Layer
Do.............................................Data Link Layer
Not............................................Network Layer
Throw........................................Transport
Sausage.....................................Session Layer
Pizza..........................................Presentation
Away.........................................Application


OSI Table: OSI Model.pdf

OSI Basics: OSI Basics.pdf

Another item of interest for the Net+ exam was the difficulty people have remembering the cable specs and seeds, connectors etc.
I often table my charts in ascending order for easy memory recall during the exam, below details the cable tables I made for the exam.

Cable Specs: Cable Specs.pdf

Network Cabling:


Many people aslo reported trouble remembering the ports and protocols, again to help out below is my ports and protocols table set out in ascending order.

Ports and Protocols: Protocols and Ports Table.pdf


It is my hope that those new to networking or the network+ exam may find this information useful, please feel free to print save and print out the above tables.