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jhn_karim
Joined: 01 May 2006
Posts: 10
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 10 May 2006 5:42 understanding seven layer |
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hello
i got a problem understanding how it works, can anybody help me, thanks
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manasiri
Joined: 01 Mar 2006
Posts: 232
Helped: 16
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| 10 May 2006 6:38 Re: understanding seven layer |
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what did you mean from "seven layer"??
explain more please.
If your question is regarding "OSI Seven-Layer Model" the see the following site:
http://sip.utc.sk/encyclopedia/Topics/15.htm
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jhn_karim
Joined: 01 May 2006
Posts: 10
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| 15 May 2006 12:44 understanding seven layer |
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oh , i mean OSI seven layer, i don't know when is a hardware is working on the data link layer, or network layer,
and what is the different of session and network layer
btw, thanks for the reply
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romrom
Joined: 15 May 2006
Posts: 7
Helped: 2
Location: Cairo, EGYPT
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| 15 May 2006 21:06 Re: understanding seven layer |
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OSI Model.. 7 layers..
layer1 :: the Physical layer: defines the acual conveying of information over the transmission medium. it determines how bits are converted into electric current,light pulses, or any other physical form by definig such factors as voltage levels,timing factors,and connector standards.
layer2:: the Data Link Layer : defines how information is transmitted throughout the network by creating and recognizing messages boundaries. and ensures that any mistakes will not be carried onto the next layer by implementing error detection,correction and re-transmitting.
layer3:: the Network Layer : is responsible for addressing and routing. this layer controls both layer 1 and layer 2. layer 3 recieves the message from layer4 and determine the addressing and routing to it and then gives it to layer 2 to handle the message.
layer4::the Transport Layer : it takes care of the transfrer of data by establishing and maintaining a connection between end users. it also breaks large transmissions into smaller packets, it also ensures all data recieved error free and removes duplicated packets.
layer5:: the Session Layer : establishes and terminates connections and arranges sessions to logical parts. it also performs accounting duties to ensure proper billing.
layer6 :: the Presentaion Layer : it's responsible for interpreting the meanings of the bits sent from one program to another and preparing this information for presentation to the user.
layer7 :: the Application Layer : provides the interface between the network and the end-user that allows the user to interact with the network.
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i hope i could help with this brief about the & layers of the OSI Model.
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jhn_karim
Joined: 01 May 2006
Posts: 10
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| 17 May 2006 6:32 understanding seven layer |
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so you mean that layer 4 is dealing the physical part and layer 5 deals with the logical part, but both of them are working on setting up the connection
i quiet understand about layer 6 and 7, but not quiet sure about layer 3, 4 and 5, any suggestion
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sidra
Joined: 05 Apr 2006
Posts: 107
Helped: 12
Location: see in yr heart...found it?
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| 17 May 2006 6:57 Re: understanding seven layer |
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well the best place to see the difference is
www.cisco.com/univercd/cc/ td/doc/cisintwk/ito_doc/introint.htm
contact me if u still hv problems.....sidra_maheen84(at)yahoo.com
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jhn_karim
Joined: 01 May 2006
Posts: 10
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| 19 May 2006 4:25 understanding seven layer |
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the link has been removed from cisco, any other link
thanks
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DarkJedi
Joined: 25 May 2004
Posts: 145
Helped: 9
Location: Lima, Perú
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| 19 May 2006 21:21 Re: understanding seven layer |
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The layer 3 deals with the IP and routing protocols.
The layer 4 deals with TCP or transport protocols, the socket communicates the layer 3 with the layer 4.
The layer 5 deals the logical connection.
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sidra
Joined: 05 Apr 2006
Posts: 107
Helped: 12
Location: see in yr heart...found it?
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| 20 May 2006 12:07 Re: understanding seven layer |
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well note down a very good link...i hope it will work this time...its a pdf document of 61 pages and i think its a good one......i hv also got a lecture ...im uploading it here...
http://wireless.ictp.trieste.it/school_2005/lectures/carlo/NetBas.pdf
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pratyk
Joined: 02 Jun 2006
Posts: 56
Helped: 5
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| 13 Jun 2006 5:58 understanding seven layer |
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| use a book like stallings or tanenbaum ... better than reading some online material ... nice way to get ur basics polished !!
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dotnone
Guest
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| 14 Jun 2006 22:21 Re: understanding seven layer |
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| Remember these facts: The OSI model is a conceptual model. For a software act in the 7 layer, it must play with the others layers... or other software must guarantee that the others layers are protocols are satisfied.
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artem
Joined: 22 May 2003
Posts: 1641
Helped: 90
Location: Turan
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| 14 Jun 2006 22:51 understanding seven layer |
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| the fantasy of OSI elders was not followed by ietf - browsing over http if not wrong does take only 4 layers. But it still works in a harsh environment called internet )
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MJVM
Joined: 09 Feb 2006
Posts: 11
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| 07 Sep 2006 1:50 Re: understanding seven layer |
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| pratyk wrote: |
| use a book like stallings or tanenbaum ... better than reading some online material ... nice way to get ur basics polished !! |
would you please post any web link for stallings: really need that e-book
thanx very much
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vini_natv
Joined: 05 Sep 2006
Posts: 7
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| 08 Sep 2006 1:48 understanding seven layer |
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| even the book by fehrouzan is good for the network basics
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adi_gupta19
Joined: 16 Jul 2006
Posts: 16
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| 23 Sep 2006 20:01 Re: understanding seven layer |
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try flazx.com or ebookclub.org
there is hell lot of books.
try searching for networking or ccna books
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dirak
Joined: 23 Sep 2006
Posts: 4
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| 24 Sep 2006 0:35 Re: understanding seven layer |
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| Kurose, Ross is a good book to learn about Networking. You can use Stallings/ Tanenbaum too
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bahaa
Joined: 22 Oct 2006
Posts: 1
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| 22 Oct 2006 12:30 understanding seven layer |
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hi too all
i need a free website from which i can download the Tanenbaumm book
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brrk007
Joined: 15 Oct 2006
Posts: 17
Helped: 1
Location: INDIA
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| 28 Oct 2006 18:22 Re: understanding seven layer |
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hi, i am uploading a very good presentation made by me on network topologies and osl layers, it will give u a brief introduction abt layers, if u have any fruther doubt, feel free to contact me
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