am I being an idiot?

Discussion in 'Odds & Ends' started by Crazy man, Nov 29, 2011.

  1. Crazy man

    Crazy man Banned

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    Ok, so here's the deal, layer 3 is the Network layer of the OSI model. Essentially they deal with incomming packets. Now, DHCP is seen as an application layer protocol (layer 7 of the model) and also DNS. Now both of them work with IP addressing and without IP addresses and DNS, the transfer of data would be non-existent. They DO fall under 'application' but can you also make a case for them being a layer 3 protocol too?
     
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  2. ollinger

    ollinger Legend

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    ummm.....no.
     
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  3. sureshs

    sureshs Bionic Poster

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    Layer 3 just routes packets across networks. DHCP and DNS are implemented by servers to dole out IP addresses or translate name to address.

    Also, everyone uses the TCP/UDP over IP stack. OSI model is sort of academic interest only.
     
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  4. sureshs

    sureshs Bionic Poster

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    Is that the answer to the post or to the thread title?
     
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  5. r2473

    r2473 Legend

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    [​IMG]
     
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  6. ollinger

    ollinger Legend

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    (answer to thread title)
     
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  7. ImAGrinch

    ImAGrinch New User

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    The network layer is required for any of the higher levels to function. You can't send packets if you don't have a way to route them through the network.

    You could eliminate DHCP and DNS and still route packets through the network.
     
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  8. ChipNCharge

    ChipNCharge Professional

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    I understood about three words in your post.
     
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  9. Fearsome Forehand

    Fearsome Forehand Professional

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    E=MC^2

    Solve for x and reboot. :)
     
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  10. Crazy man

    Crazy man Banned

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    I understand what the OSI model does. By the way the differences between the Internet Model and OSI is that 7,6,5 are scaled into the Application layer of the Internet model and has no Physical layer like OSI. That's why I mentioned OSI as it's expanded.
     
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  11. Crazy man

    Crazy man Banned

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    Not true, if one host wanted to send a message to another host on a different computer system over a network you would need a Fully Qualified Domain Name. Reverse lookup zones are used to translate an IP address into a FQDN.
     
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  12. ImAGrinch

    ImAGrinch New User

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    You can send messages directly to a remote IP ithout specifying a FQDN.
     
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  13. ImAGrinch

    ImAGrinch New User

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    Sorry can't edit as a new user I presume, but DNS is not necessary for TCP/IP to work. But it is necessary for the internet to remain easy to use. Otherwise people would have to memorize IP addresses when getting on websites.
     
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  14. Sentinel

    Sentinel Bionic Poster

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    OP,
    You should join forums such as stackoverflow.com and its sisters superuser.com .
     
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  15. Crazy man

    Crazy man Banned

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    Yeah I get it, I thought I uncovered a slight flaw in the model, that's all. Before DNS they used HOSTs file, which was ridiculous.
     
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  16. thug the bunny

    thug the bunny Professional

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    What is the best detection method for UHPLC of organic species at the ppb level that don't contain pi electrons and thus do not show a usable UV-VIS specrum?

    Wait...why am I posting this in a tennis forum??
     
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  17. sureshs

    sureshs Bionic Poster

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    It is all about sigma and pi bonds
     
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  18. r2473

    r2473 Legend

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    The bonds can last a lifetime (especially if you knock up a tri-delt):

    [​IMG]
     
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  19. Polaris

    Polaris Hall of Fame

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    This.

    10routers.
     
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