[Year 12 SofDev] Physical Layer
John Bellavance
John.Bellavance at beaconhills.vic.edu.au
Fri Mar 11 08:40:31 EST 2011
Hi,
Here is my reflection;
The physical layer involves sending data. A DOS attack involves the use
of IP, but the attack is to overwhelm the physical layer with masses of
binary transmissions. I believe that this is where the link exist. The
attack starts at the physical layer but uses data link and the network
layer to do its nasty work.
John Bellavance
Beaconhills College Berwick
-----Original Message-----
From: sofdev-bounces at edulists.com.au
[mailto:sofdev-bounces at edulists.com.au] On Behalf Of Kevork Krozian
Sent: Thursday, 10 March 2011 11:00 PM
To: 'Year 12 Software Development Teachers' Mailing List'
Subject: Re: [Year 12 SofDev] Physical Layer
Hi Russell,
Sorry for the delay ... busy teaching the OSI model in Cisco ....
The KK : purposes and functions of the physical layer (Layer 1) of the
OSI and the relationship of the physical layer to the Transmission
Control Protocol/Internet Protocol model
is still unclear to me. The OSI physical (layer 1) layer's relationship
with the TCP/IP protocol model ( read as Transmission Control
Protocol/Internet Protocol Protocol ) is as much a mystery to me as it
seems to be to everyone else.
In Cisco CCNA we do mostly the OSI model and only a little of the
TCP/IP model. I have found your references to the lowest layer of the
TCP/IP model (network access ) only handling layer 2 equivalent of the
OSI which would only deepen the mystery (see
http://www.tcpipguide.com/free/t_TCPIPArchitectureandtheTCPIPModel-2.htm
)
I am wondering if the word model at the end of the KK statement had a
different purpose than the 4 layer TCP/IP model. Perhaps the intention
was to relate the physical layer of the OSI to the role of TCP ( layer 4
) and IP ( layer 3 ) layers still within the OSI model. Even then, I am
not sure there is a relationship between layer 1 and layers 3 and 4. The
layered model allows development and accelerates evolution, as the
fabulous slide show by John Bellavance outlines. Mark's slide show is
also very helpful in understanding the layers.
So, all in all I am in the same boat as you Russell.
Kevork Krozian
Edulists Creator Administrator
www.edulists.com.au
tel: 0419 356 034
-----Original Message-----
From: sofdev-bounces at edulists.com.au
[mailto:sofdev-bounces at edulists.com.au]
On Behalf Of Russell Quinn
Sent: Wednesday, 9 March 2011 1:44 PM
To: sofdev at edulists.com.au
Subject: Re: [Year 12 SofDev] Physical Layer
Having read around a bit, I was under the impression that the TCP/IP did
not address the physical layer (as in pulse shaping, line voltages etc)
at all, and that it assumed the physical infrastructure was in place
ready to do the bidding of the TCP/IP protocol. My understanding is that
the TCP/IP ends at the Data link MAC protocols - or am I up the creek.
As usual, the VCAA has left it up the teaching staff to define the
course by consensus.
I assume Kevork has a definitive view????
Regards,
Russell Quinn
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Message: 1
Date: Wed, 9 Mar 2011 13:21:10 +1100
From: Mark KELLY <kel at mckinnonsc.vic.edu.au>
Subject: [Year 12 SofDev] SD key knowledge
To: "Year 12 Software Development Teachers' Mailing List"
<sofdev at edulists.com.au>
Message-ID:
<AANLkTimjkZykgD6mkEW91G2imKCsF9PdFTLD_JYBBOYt at mail.gmail.com>
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*SD U3O1 KK04
Purposes and functions of the physical layer (Layer 1) of the OSI and
the relationship of the physical layer to the Transmission Control
Protocol/Internet Protocol model*
For quite some time now I've been avoiding this KK because I'd rather
clean a dead dog's ears than spend time on the OSI.
But in the end I had to find the cotton buds and get stuck in, and I
think I have a reasonable overview of the OSI and how TCP/IP maps to it.
(even produced a draft slideshow
<http://www.vceit.com/slideshows/SD-OSI.ppt>).
But the second part of KK04 really has me baffled: *the relationship of
the physical layer to the Transmission Control Protocol/Internet
Protocol model.
*
I know that TCP/IP's Network interface layer maps to OSI's physical
layer (and the data link layer), but for the life of me I can't see how
it's any more significant than any of OSI's or TCP/IP's other layers.
Can someone suggest why the relationship between the OSI physical layer
and TCP/IP is so significant?
Has this relationship been in the papers? Has this physical
relationship resulted in offspring?
Is Mr OSI going to be on Oprah... or the Jerry Springer show?
--
Mark Kelly
Manager of ICT, Reporting, IT Learning Area McKinnon Secondary College
McKinnon Rd McKinnon 3204, Victoria, Australia Direct line / Voicemail:
+613 8520 9085, Fax +613 9578 9253 kel at mckinnonsc.vic.edu.au
VCE IT Lecture Notes: http://vceit.com
Moderator: IT Applications Edulist
All generalisations are false, except this one.
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Message: 2
Date: Wed, 9 Mar 2011 13:33:00 +1100
From: "Judee Hobbs" <forscutt.judee.k at edumail.vic.gov.au>
Subject: Re: [Year 12 SofDev] SwinGame Games Design Competition -
Registrations Open NOW!
To: "'Year 12 Software Development Teachers' Mailing List'"
<sofdev at edulists.com.au>
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<005401cbde02$4f639be0$ee2ad3a0$@judee.k at edumail.vic.gov.au>
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Hello,
Does anybody know about this SwinGame?
Judee Forscutt-Hobbs
Lowanna College
From: sofdev-bounces at edulists.com.au
[mailto:sofdev-bounces at edulists.com.au]
On Behalf Of Bianca van Meeuwen
Sent: Monday, 28 February 2011 3:42 PM
To: itapps at edulists.com.au ; sofdev at edulists.com.au ;
yr11it at edulists.com.au ; yr7-10it at edulists.com.au
Subject: [Year 12 SofDev] SwinGame Games Design Competition -
Registrations Open NOW!
Dear teachers,
The annual SwinGame <http://www.swingame.com> : Games Design
Competition is on again! Registrations are now open
<http://www.swingame.com/wiki/index.php?title=Register> !
Imagine, Design and Create the Ultimate Arcade Game!
<http://www.swingame.com/wiki/index.php?title=File:Swingame10.jpg>
SwinGame 2011 is a games development competition for all Australian
Secondary School students. It is a chance to win great prizes, gain
real-world experience in software and games development and work on a
fun creative project with friends.
The SwinGame competition is an exciting opportunity to showcase
technical and design skills by creating a game using the SwinGame
Software Development Kit to build an Arcade game.
The competition is open for registration now
<http://www.swingame.com/wiki/index.php?title=Register> ! Students are
required to submit deliverables by 5.30pm on Friday 5 August, 2011.
This year's prizes are:
* 1st prize is $2,500 cash for the team or individual student
* 2nd prize is $1,000 cash for the team or individual student
* 3rd prize is $500 cash for the team or individual student
The winning teams or individuals will be announced at Swinburne's Open
Day,
2011 - Hawthorn Campus swinburne.edu.au/openday
If students need help with designing their game, please don't hesitate
to contact us <http://www.swingame.com/wiki/index.php?title=Contact> or
use the forum <http://www.swingame.com/swinforum/>
If you wish to receive a SwinGame poster for your classroom, please
contact me directly on 9214 8768 or bvanmeeuwen at swin.edu.au .
We look forward to seeing lots of creative games!
Regards,
Bianca van Meeuwen
ICT Outreach Officer
Faculty of Information and Communication Technologies
Swinburne University of Technology
PO Box 218 John Street
Hawthorn 3122
bvanmeeuwen at swin.edu.au
p: 9214 8768
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