Quality of Service refers to the mechanisms, protocols, or ideas behind the prioritization of traffic based on different criteria – including source, destination, upper layer protocols, and actual layer 7 data.

Apparently that definition is wrong

CSC401 is not as good as I had hoped. Any other net classes worth taking?

2/19/2007 4:46:37 PM

what is CSC401's definition?

2/19/2007 4:55:22 PM

Quote :

" Basic concepts of data communication networking and computer communications architectures, including packet/circuit/virtual-circuit switching, layered communication architecture and OSI layers, general description of DLC, network and transport layers, some detailed protocol study of Ethernet, ATM and TCP/IP. Credit is not allowed for both CSC 401 and ECE 407."

2/19/2007 4:59:49 PM

Why are you taking it with Dutta? Take it with Theunte is he teaches it again...

2/19/2007 5:02:41 PM

yah, i should have done that i guess
unfortunately, w/ time restraints and trying to graduate on time, i cannot be picky

2/19/2007 5:05:08 PM

i mean, what's their definition of QoS?

2/19/2007 5:05:38 PM

^more of how it applies as a service provider to customer product

"A contract entered into by the network and the customer, composed of levels of well defined metrics of network performance - a guarantee made by the provider to the customer"

many of the questions in that class are very subjective, yet graded very specifically.

im just hatin b/c im used to the cisco definitions

[Edited on February 19, 2007 at 5:10 PM. Reason : .]

2/19/2007 5:10:11 PM

holy shit, that definition is patently wrong.


I mean, usually, these classes have a disconnect from the real world simply because they focus on theory rather than implementation/application, but this is just a case of being wrong.

Quote :

""A contract entered into by the network and the customer, composed of levels of well defined metrics of network performance - a guarantee made by the provider to the customer""

I mean, that's not even networking. That's billing. haha, god that's lame.

2/19/2007 5:15:49 PM

^So lame, I decided to post on tww about it

Na I knew someone would see it this way - in all honesty, I was pissed that this question was counted wrong b/c QoS seems to be synonymous with my definition and not so much with a business service

2/19/2007 5:19:43 PM

Any one in ECE407? That class has been the worse ECE class ive had so far. The prof didn't even understand the differences between a hub and a switch.


Disclaimer: Yes, I know the ECE prof knows things about networks that I only dream about, still he should also know the basics as well as the advanced.

2/19/2007 6:53:39 PM

we have a lot of "smart hubs" here at work that are essentially "dumb switches"

i think the lines between switch and hub have become blurred in practice.

2/19/2007 7:10:23 PM

What equipment is it?

All of the smart hubs i've seen are only distinct from standard hubs in that they have multiple internal repeaters to support devices that connect at different speeds, as plain dumb hubs simply regenerate signals.

I don't really come across hubs very much these days except when some dumbass connects a hub to two different switch ports and causes a layer 2 loop and network meltdown.... good times.

Quote :

"i think the lines between switch and hub have become blurred in practice."

I don't really agree with that. Hubs operate on a single collision domain and operate at layer 1, whereas switches segment collision domain and operate at layer 2. Now, these days you do have a blurred line between switches and routers, as all of the big vendors offer layer 3 switches and concurrently route and switch on the same box.

2/19/2007 9:06:25 PM

Quote :

""A contract entered into by the network and the customer, composed of levels of well defined metrics of network performance - a guarantee made by the provider to the customer""

That sounds like it is referring to Service Level Agreement (SLA) or possibly Service Level Specification (SLS.) I've never even taken a CSC class and I know that.

Sounds like he fucked up. If he is using an erroneous key then he is probably fucking up a lot of people's tests. I'd discuss it with him.

[Edited on February 19, 2007 at 9:18 PM. Reason : l]

2/19/2007 9:13:40 PM

haha,

ask him if he can find that definition in any of the following RFCs:

2386, 2990, or hell, anything here:

http://www-lor.int-evry.fr/~pascal/RFC/S.qos.html

2/19/2007 9:25:45 PM

Quote :

" it is referring to Service Level Agreement (SLA)"

beat me to it

2/19/2007 10:58:51 PM

dutta still teaches that?...hahahaha

2/19/2007 11:55:49 PM

ditto ... SLA was the first thing that came to mind.

QoS is the technology that makes the contracts possible. Stupid Prof.

2/20/2007 3:25:11 PM

what is the prof's email address?

2/20/2007 7:56:48 PM

we all had a good laugh about this today around the coffee machine.

2/23/2007 8:44:38 AM

That definition of QoS isn't actually wrong per se from a service provider standpoint. At its highest level, QoS is giving the customer exactly what they pay for.

Unfortunately, that definition is also entirely useless for anything technical.

2/23/2007 1:49:40 PM