OSI model

GrahamUK33GrahamUK33 Registered Users Posts: 5 ■□□□□□□□□□
Is it me or is anyone else finding it very difficult to remember the OSI model. icon_redface.gif

Comments

  • ZartanasaurusZartanasaurus Member Posts: 2,008 ■■■■■■■■■□
    Please Do Not Throw Sausage Pizza Away.
    Currently reading:
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  • TackleTackle Member Posts: 534
    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
  • SykkSykk Member Posts: 29 ■□□□□□□□□□
    I changed it!

    Please do not throw salami pizza away.. Guess because you can't really get sausages on a pizza
    [√] 70-640 - 21/07/2011
    [ ] 70-642 - Currently reading Exam 70-642 Configuring Windows Server 2008 Network Infrastructure
  • Tfoote01Tfoote01 Member Posts: 11 ■□□□□□□□□□
    All People seem to need data processing...
  • ZartanasaurusZartanasaurus Member Posts: 2,008 ■■■■■■■■■□
    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.
    Currently reading:
    IPSec VPN Design 44%
    Mastering VMWare vSphere 5​ 42.8%
  • cyberguyprcyberguypr Mod Posts: 6,928 Mod
    Tfoote01 wrote: »
    All People seem to need data processing...

    This one is embedded in my brain along with PEMDAS (order of math operations).
  • QHaloQHalo Member Posts: 1,488
    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 :p

    And I use All People Seem To Need Data Processing as well
  • billyrbillyr Member Posts: 186
    All Pu**ies Seem To Need Deep Penetration.

    For some reason I've never forgotten that one.
  • some guysome guy Member Posts: 28 ■□□□□□□□□□
    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

    icon_cheers.gif
    A+ ~ Feb 2010
    Network+ ~ Jun 2010
    Security+ ~ April 2011

    Up next: ???
  • hbbnthbbnt Registered Users Posts: 5 ■□□□□□□□□□
    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 guysome guy Member Posts: 28 ■□□□□□□□□□
    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.icon_study.gif
    A+ ~ Feb 2010
    Network+ ~ Jun 2010
    Security+ ~ April 2011

    Up next: ???
  • petemn79petemn79 Member Posts: 11 ■□□□□□□□□□
    Please Do Not Throw Sausage Pizza Away.

    When I was in college, my prof used:

    Programmers Do Not Throw Sausage Pizza Away.
  • ZartanasaurusZartanasaurus Member Posts: 2,008 ■■■■■■■■■□
    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. icon_sad.gif
    Currently reading:
    IPSec VPN Design 44%
    Mastering VMWare vSphere 5​ 42.8%
  • onesaintonesaint Member Posts: 801
    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.
    Work in progress: picking up Postgres, elastisearch, redis, Cloudera, & AWS.
    Next up: eventually the RHCE and to start blogging again.

    Control Protocol; my blog of exam notes and IT randomness
  • elad123elad123 Member Posts: 26 ■□□□□□□□□□
    All People Seem to Need Dominos Pizza
  • demonfurbiedemonfurbie Member Posts: 1,819
    apst|ndp
    wgu undergrad: done ... woot!!
    WGU MS IT Management: done ... double woot :cheers:
  • bigmantenorbigmantenor Member Posts: 233
    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.
  • quinnyflyquinnyfly Member Posts: 243 ■■■□□□□□□□
    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.
    The Wings of Technology
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