CareersNG

Really!!!! I love your confidence and desire to share what you have. Anyway, I really wish to know much about networking.

Let me try to answer the bandwidth question-- It is on the transport layer of the OSI.

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Seed time and harvest shall never cease...

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More twisted than dreadlocks

Interestingggg Answersss
Sory i ve been out of internet for a while....
Whats funny to me is that i dont know where i cooked up the question of which OSI layer bandwidth is, i tink i was just trying to figure out how things work then.
Anyway, from my own understanding and experince, bandwidth is in Layer 1

Of the OSI.
Why because bandwidth is basically a measure of how large ur internet connection pipe is in bits per second. bits are used in layer1. Also technologies like fiber optic, wifi, Cat5 Cable etc, all are in layer1, and they determine the maximum bandwidth your network can have.

Although, some bandwidth stuffs could also be in datalink layer(layer2). When we talk about Fast Ethernet Switches, and switch mode/speed.
But the major is on layer1.

Any more questions/answersss

REgardss

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Fowe.
Choices make or mar Chances ... add extra care to your choices today.

Yes Bros.

You are right that the physical layer (cables etc) limit the data rate. But I know that datarate is mostly specified in layer 2 (for most protocols).

I remember (abandoned networking stuffs a long time ago ) that settings in higher OSI layers affect the lower layers, so my thinking was that even if you have a 1Gb/s link (layer 1) and specify 10Mb/s data rate in Layer 2 (datalink) then the connection is effectively 10Mb/s regardless of whats on layer 1.

But anyway, you guys are the current gurus. Keep on rockin.

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More twisted than dreadlocks

aahh x-2-x na you be the big bross oo, u no say u be our supervisor.
When we need reference we would contact you.
Me self, i ve stopped active networking for abt 2yrs now. Now i do programming, but i tink i realy knew what i was doing den when i was in networking...

I am awaiting otherssss

_________________
Fowe.
Choices make or mar Chances ... add extra care to your choices today.

_________________
Fowe.
Choices make or mar Chances ... add extra care to your choices today.

_________________
More twisted than dreadlocks

_________________
Fowe.
Choices make or mar Chances ... add extra care to your choices today.

_________________
Fowe.
Choices make or mar Chances ... add extra care to your choices today.

****

Network Operating systems offer routing functionality. Linux gives you routed, Windows gives you RRAS.

U can use RRAS on Windows Servers (NT, 2000, .NET, 2003, and the soon to be released 2008).

RRAS is Routing and Remote Access Service. Its a Windows Server Service (just like Linux daemons, say BIND, httpd, routed, etc). It basically enables u to reproduce a fully functional Router using WINDOWS only! U only need at least 2 network interfaces on your server.

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More twisted than dreadlocks

**continued**

From your description, I think you need 3 interfaces ( 1 LAN, and 2 others)on your server. The LAN interface (call it SERVER_LAN connection) would have a local IP that your clients in the same workgroup can reach.

The other two connections on your server (say 2 modems, or 1 radio + 1 modem or whatever) should be configured to enable u connect (using either of them) to the internet (right from the server itself; as in you can browse the internet using any of them if you are sitted in front of your server) tru your VSAT/ISP/dial-up.

Now Configure RRAS on both interfaces. (browse the internet for tutorials on this; if you know any genuine MCSE holder around, ask him; its not so difficult; Mind you, doing a search with "RRAS" on google typically throws up micro$oft results first, you dont want to go there, thier focus used to be on RRAS as a mainly a dial-in service, even many MCSE's still dont know much about the routing part of the service. They know more about the remote access part; Blame Micro$oft; but there is a good reason for that! ).

This will basically give you a ROUTER! Anything feature you can configure on a mid-range cisco/D-LINK router is available to you here. Anything (well almost) you can do with an average router, can be done with RRAS from here.

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More twisted than dreadlocks

**Continued**

The trick is what you now configure yourself on RRAS -
You can configure routing/routed protocols, including load balancing over your two connection, address filtering, whatever - just name it ! Dial-On-Demand sef is possible - So your Modem connection can "go to sleep" until trafic across the Radio link exceeds a threshold, then RRAS will "wake it up" and route traffic tru it. Will try to post a guide on configuring RRAS later, but you can get better guides/tutorials on the web. Last time I did it was with my good old friend: Windows 2000 Server. Dunno what OS you are using, but RRAS has only gotten better over the years (in server 2003 especially. I hear it is now so good it comes pre-installed, as in ready to roll), so you should be able to do even more.


Do your workgroup clients network configuration such that it directs them to use the SERVER_LAN's IP as their default gateway (i.e use SERVER_LAN as default gateway for client network connection settings)

(Note with RRAS, you can monitor traffic, see statictics etc, you can know whats happening, realtime. Just like Cisco's IOS 'debug' commands)

Eureka! You can start surfing.

Fowe, Oya tell us a lil' somthing!

_________________
More twisted than dreadlocks

_________________
Fowe.
Choices make or mar Chances ... add extra care to your choices today.

_________________
Fowe.
Choices make or mar Chances ... add extra care to your choices today.

_________________
More twisted than dreadlocks

Thanks all for the answers

_________________
Fowe.
Choices make or mar Chances ... add extra care to your choices today.

Now back to the topic...
Lets Nigerianlize it a bit...lets look at a typical Nigerian LAN..
It has a static 192.168.x.x addy etc... and can brows the internet through a gateway or proxy...all connected to a switch or a Hub! We dont often use DHCP on a small LAN i guess?
Sometimes the internet link would suddenely become very sloww..this happens to a lot of networks without sound understanding of whats going wrong...
Now, has it ever happened to you before that when you remove a particular network cable, u notice the internet speed increase, and u plug that cable back in and it slows down again....and you trace the cable and it goes to a wondoes PC that nobody is even using!
I bet you its most likely been used by some agents either physical or virtual.. its...either due to your over installation of so many internet based programs or a network trojan! or a PC virus...or a Spammers/Scammers sofwate engine...
If its a cafe...Rather than doing the Nigerian thing...which is taking that PC formatting and reinstalling the OS(which would solve the problem anyway) What you need as a professional is a good firewall and TCP/IP traffic analyzer at your gateway junction to the internet.
How do you analyze this packets... if you cannot imagine how it works..this is part of the few things we like to discuss in this topic.
The idea is not to re-invent the weel, we want to solve practical problems...not going through a textbook all over....
Details on howto analyze a TCP/UDP packet would be posted soon....

Regards

_________________
Fowe.
Choices make or mar Chances ... add extra care to your choices today.

Forum upgrade is good news for me.
It would be easier for me to show illustrations on this topic now with powerpoint presentations.

Regards to all

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Fowe.
Choices make or mar Chances ... add extra care to your choices today.

Good topic.
Hope to participate in this wealth of experience.
All the best in the revelation.

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Focus on the FUTURE

@Fowe

What does IPv6 bring to the table, apart from larger address spaces?

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More twisted than dreadlocks