What are the 7 layers of OSI model or TCP/IP

Thread Tools Search this Thread
Special Forums UNIX Desktop Questions & Answers What are the 7 layers of OSI model or TCP/IP
# 1  
Old 03-19-2002
What are the 7 layers of OSI model or TCP/IP

what is it??

I looked everywhere but cant seem to find it

also where can I get information about the difference between NFS 2 or NFS 3??
# 2  
Old 03-20-2002
i have a feeling that this is a homework assignment. I hope you did read the Forum Rules if this is an homework assignment.

Check this link for the OSI TCP/IP

For the NFS 2 & 3
# 3  
Old 03-20-2002
1. Physical layer
2. Data Link layer
3. Network layer
4. Transport layer
5. Session layer
6. Presentation layer
7. Application layer

# 4  
Old 03-21-2002
Here's a good way to remember it:
All People Seem To Need Data Processing

Application, Presentation, Session, Transport, Network, Data-Link, Physical.
# 5  
Old 03-21-2002
Here is another question:

With N-tier web application services and publish-subscribe architectures in the picture, what are the current layered protocol stack (complexity management) models?
# 6  
Old 03-21-2002
First, please see my post in this thread.

Originally posted by Neo
Here is another question:

With N-tier web application services and publish-subscribe architectures in the picture, what are the current layered protocol stack (complexity management) models?
Stuff like this does not modify the basic networking protocols. Rather, it imposes much more order on the application layer. The three tier model, which my company now uses, says that the user should not need a special client for your application. Instead, the user should just use a local web browser. Next, the user should not be expected to learn sql or anything like it to search a database. Some kind of easy to use middleware should interupt the user's needs and figure out what to do. That front-end to our database is complex and multi-layered itself. But we still call the whole concept a three tiered approach.

In the old days, we would have delivered special client software to our customers with its own user interface. And some skill would be needed to search our database. Now our customers just use a web browser and this alone shortens the learning curve. And you could probably teach Lassie to search our database...no sql or anything.

But the whole shebang is running on TCP/IP which has not changed. I don't know what publish-subscribe means, but I doubt that it modified TCP/IP either.
# 7  
Old 03-21-2002
The OSI stack was developed for a strict client-server architecture. One new "web centric" architecture is more like"

  1. Presentation Logic
  2. Personalization Logic
  3. Session and Session Security Logic
  4. Application Logic
  5. Information Sharing Logic

    ....lower level transport stacks here ....

The old OSI client-server model does not apply to multi-tier 'web driven' architectures because presentation logic and personalization logic are at the top of the stack and application logic is moved to the middle tier.... this decouples presentation and personalization from application and publish-subscribe peer-to-peer services. OSI applies toward a specific class of client-server that predates n-tier.

Sorry, trick question Smilie
Login or Register to Ask a Question

Previous Thread | Next Thread

9 More Discussions You Might Find Interesting

1. Solaris

Too much TCP retransmitted and TCP duplicate on server Oracle Solaris 10

I have problem with oracle solaris 10 running on oracle sparc T4-2 server. Os information: 5.10 Generic_150400-03 sun4v sparc sun4v Output from tcpstat.d script TCP bytes: out outRetrans in inDup inUnorder 6833763 7300 98884 0... (2 Replies)
Discussion started by: insatiable1610
2 Replies

2. Solaris

Unable to start OSI deamon

dear all, i am working on test server with solaris 10 , after installing OSI deamon i stopped it for a test now when i am starting again i am getting this message that i ggoled and search evrywhere and haven't any response i will be glade for any help in here mate the error was : ./osinet... (1 Reply)
Discussion started by: semaan
1 Replies

3. IP Networking

OSI model, communication between same layers but on different machines

Hi friends, I hope everyone is doing fine. I have this confusion regarding the OSI model. I have been reading a book on datacommunication and networking which discusses the OSI model in great detail. One thing that I can't figure out is the OSI daigram in this book. It shows communication between... (1 Reply)
Discussion started by: gabam
1 Replies

4. Debian

OSI application for Debian...

Is there OSI telecom application which can be installed on debian similar to Solstice Solaries OSI ? I need to get it on debian to build cmise and communicate with Network element . (0 Replies)
Discussion started by: atiato
0 Replies

5. Solaris

OSI interface...

I'm using OSI version 9.0 with solaries OS , I 'm thinking of analysing the tracing while sending information through OSI layers , I want to analyze exactly the BER data ? Any one could provide an examples , I know the command for tracing these information but i need to understand the bytes travels... (1 Reply)
Discussion started by: atiato
1 Replies

6. Solaris

OSI 9.0 Installation some question

Hi. I get the folloing message if i try to start the osinet deamon: # /etc/rc2.d/S90osinet start starting osi daemonunable to unload all the osi modules some OSI applications may be running unable to start OSI daemon # Has anyone an idea what is going wrong? Answers to mail: (Note... (1 Reply)
Discussion started by: morenqfj
1 Replies

7. Solaris

OSI 9.0 Installation

Dear After i received a demo license for OSI 9.0 from SUN , i installed the packages . but when i tried to start the osinet deamon ( /etc/rc2.d/S90osinet ) i am getting the foellowing errror # ./S90osinet start starting osi daemon/usr/sbin/osinetd cannot find a valid license (STACK 9.0)... (4 Replies)
Discussion started by: itsgeorge
4 Replies

8. IP Networking

The OSI-model

after reading a paper about the OSI-model I'm not exactly sure how to look at this model. Does data (a file) travel from the application level "down" each layer at the client Application V Presentation V Session V Transport V Network V Data link V | | | (Physical) | (3 Replies)
Discussion started by: J.P
3 Replies

9. IP Networking

Network Layers

Could anyone give a better picture of visualising the 7 layers in networking ? How the data is sent ...which part of it is taken care of by software and which is hardware related ? I stumble here everytime I read a book on networking.. (1 Reply)
Discussion started by: seshagiri
1 Replies
Login or Register to Ask a Question