OSI & Network components?

dokko · 23 Jan 2008 at 13:08

Does anyone know in lament terms what the OSI is?

From research i gather its some sort of structure, in which network setups follow.

I've seen the 7 stages, but i've been asked how each network component will function with respect tot he ISO model.

I'm a bit stuck. I've not heard of it until about an hour ago, and i'm finding it all a bit hard to digest to answer the question.

If anyone could explain it or give me an example of a component paired to a level/stage then that would be more the great.

Cheers.

dangermouse · 23 Jan 2008 at 16:31

dokko said:
Does anyone know in lament terms what the OSI is?

From research i gather its some sort of structure, in which network setups follow.

I've seen the 7 stages, but i've been asked how each network component will function with respect tot he ISO model.

I'm a bit stuck. I've not heard of it until about an hour ago, and i'm finding it all a bit hard to digest to answer the question.

If anyone could explain it or give me an example of a component paired to a level/stage then that would be more the great.

Cheers.

Some sort of homework?

Phemo · 23 Jan 2008 at 16:57

The Wiki article explains it all pretty well:

http://en.wikipedia.org/wiki/OSI_model

mdjmcnally · 23 Jan 2008 at 18:31

In real laymens terms it is a 7 layer framework that is a reference mode.

About the only thing that I can think of that fits into the model is DecNet IV phase 5 (unless you did DEC VAX then don't worry if never heard of it)

As such networking components don't fit into the model.

dokko · 23 Jan 2008 at 19:18

dangermouse said:
Some sort of homework?

Yeah, assignment that's just taken me a little by surprise, left too the last minute, my own fault for thinking i read the questions and understood them properly.

dokko · 23 Jan 2008 at 19:19

Phemo said:
The Wiki article explains it all pretty well:

http://en.wikipedia.org/wiki/OSI_model

I've been on there but it doesn't link well to what i've been asked to do.

dokko · 23 Jan 2008 at 19:22

mdjmcnally said:
In real laymens terms it is a 7 layer framework that is a reference mode.

About the only thing that I can think of that fits into the model is DecNet IV phase 5 (unless you did DEC VAX then don't worry if never heard of it)

As such networking components don't fit into the model.

So networking components don't even fit in to the layer?

Here's the question:

"Explain how each network component you select will function with respect to the 7-layer OSI/ISO model"

I was asked to design a network for a small buiness, equipment includes, servers, PCs, Switch, Router/modem, Firewall, internet.

Laser402 · 23 Jan 2008 at 20:22

Server: Layer 7 (Provides HTTP, FTP, PDC, Files)
PC: Layer 7 (Accesses HTTP etc)
Switch: Layer 2 as it just deals with physical addresses (MAC addresses)
Router: Layer 3 as it deals with logical addresses (IP addresses)
Firewall: Can go up to layer 7 depending on what filtering method.
Internet: The Internet itself is just routers connecting networks so Layer 3

dokko · 23 Jan 2008 at 21:20

Laser402 said:
Server: Layer 7 (Provides HTTP, FTP, PDC, Files)
PC: Layer 7 (Accesses HTTP etc)
Switch: Layer 2 as it just deals with physical addresses (MAC addresses)
Router: Layer 3 as it deals with logical addresses (IP addresses)
Firewall: Can go up to layer 7 depending on what filtering method.
Internet: The Internet itself is just routers connecting networks so Layer 3

That's useful, cheers mate.

Laser402 · 23 Jan 2008 at 21:34

No Problem, basically the main layers are those stated though.

Layer 1 - Cables
Layer 2 - Switches/Bridges
Layer 3 - Routers
Layer 4 - TCP/UDP Protocols
Layer 5/6 - Nothing special in these really
Layer 7 - HTTP, FTP, SMTP, SNMP Protocols n services.