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Home > Archive > microsoft.public.cert.exams.mcse > June 2002 > Is it DORA or ROSA?
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Is it DORA or ROSA?
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| Jim Burton 2002-06-22, 6:34 pm |
| In my study guide, the DHCP protocol is listed as DHCPDiscover, DHCPOffer,
DHCPRequest and DHCPAck. This is immediately followed with the hint that
ROSA (Request, Offer, Select and Acknowledge) is a good memory tool! Seems
to me that DORA (Discover, Offer, Request and Ack) would be more
appropriate.
So, which is correct: the protocol (DORA) or the acronym (ROSA)?
| |
| Paul E. Knight 2002-06-22, 6:34 pm |
|
Send out a broadcast to Discover/Request what DHCP servers are available
Reveive Offers and determine which one is the best one.
Make a request of a the targeted DHCP server to get an IP address
Lastly ACKnowledge that you got the IP address to the offering DHCP server.
SO, ROSA/DOSA is pretty much the same.
Paul
Don't split hairs. For one they don't like it and two, it makes a mess...
"Jim Burton" <jim.bNuOrStPoAnM@unisys.com> wrote in message
news:a7b6n1$1fq3$1@si05.rsvl.unisys.com...
> In my study guide, the DHCP protocol is listed as DHCPDiscover, DHCPOffer,
> DHCPRequest and DHCPAck. This is immediately followed with the hint that
> ROSA (Request, Offer, Select and Acknowledge) is a good memory tool!
Seems
> to me that DORA (Discover, Offer, Request and Ack) would be more
> appropriate.
>
> So, which is correct: the protocol (DORA) or the acronym (ROSA)?
>
>
| |
| JayDubb 2002-06-22, 6:34 pm |
| It's DORA...
D_iscovery (client broadcasts for available DHCP servers)
O_ffer (available servers respond, making a tentative IP offer to client)
R_equest (client selects one, then formally requests it from server)
A_cknowledge (server acknowledges and sends additional parameters)
Jim Burton wrote:
>
> In my study guide, the DHCP protocol is listed as DHCPDiscover, DHCPOffer,
> DHCPRequest and DHCPAck. This is immediately followed with the hint that
> ROSA (Request, Offer, Select and Acknowledge) is a good memory tool! Seems
> to me that DORA (Discover, Offer, Request and Ack) would be more
> appropriate.
>
> So, which is correct: the protocol (DORA) or the acronym (ROSA)?
| |
| Simon Geary 2002-06-22, 6:34 pm |
| There is no right answer, all it is is a simple association which helps you
learn the order of DHCP packets. You can call it whatever the hell you want.
Associate each step with a different colour and it will do the same job.
"JayDubb" <jay@dubb.nowhere.org> wrote in message
news:3C9938FB.34E30ED2@dubb.nowhere.org...
> It's DORA...
>
> D_iscovery (client broadcasts for available DHCP servers)
> O_ffer (available servers respond, making a tentative IP offer to
client)
> R_equest (client selects one, then formally requests it from server)
> A_cknowledge (server acknowledges and sends additional parameters)
>
>
>
> Jim Burton wrote:
> >
> > In my study guide, the DHCP protocol is listed as DHCPDiscover,
DHCPOffer,
> > DHCPRequest and DHCPAck. This is immediately followed with the hint
that
> > ROSA (Request, Offer, Select and Acknowledge) is a good memory tool!
Seems
> > to me that DORA (Discover, Offer, Request and Ack) would be more
> > appropriate.
> >
> > So, which is correct: the protocol (DORA) or the acronym (ROSA)?
| |
| Robert Pieroth 2002-06-22, 6:34 pm |
| "Paul E. Knight" <Pauleknight@yahoo.com> schrieb im Newsbeitrag news:#25JP3G0BHA.2052@tkmsftngp03...
>
> Send out a broadcast to Discover/Request what DHCP servers are available
I agree that the word "Request" starts with "R". So we get R
But it's a discover at this point and no request. So I would prefer D
> Reveive Offers and determine which one is the best one.
I agree that the word "Offer" starts with "O". So we get RO (or DO)
> Make a request of a the targeted DHCP server to get an IP address
Were the hell can I find a "S" here for ROS or DOS?
In my opinion the word request starts with an R. So we get ROR or DOR.
> Lastly ACKnowledge that you got the IP address to the offering DHCP server.
I agree that the word "Acknowledge" starts with "A". So we get RORA or DORA.
> SO, ROSA/DOSA is pretty much the same.
DOSA??? 
Confusing.... :-(
Robert Pieroth
| |
| ROU Velocity Governor 2002-06-22, 6:34 pm |
| Reminds me of the mnemonic for logon credential authentication :
Kerberos start
Initiate
Challenge
Kerboros end
Make Offer
Yes / No accept
Deny access
Or
Grant access
"Robert Pieroth" <robert.pieroth@onlinehome.de> wrote in message
news:OdpeB#M0BHA.1712@tkmsftngp04...
> "Paul E. Knight" <Pauleknight@yahoo.com> schrieb im Newsbeitrag
news:#25JP3G0BHA.2052@tkmsftngp03...
> >
> > Send out a broadcast to Discover/Request what DHCP servers are available
> I agree that the word "Request" starts with "R". So we get R
> But it's a discover at this point and no request. So I would prefer D
>
> > Reveive Offers and determine which one is the best one.
> I agree that the word "Offer" starts with "O". So we get RO (or DO)
>
> > Make a request of a the targeted DHCP server to get an IP address
> Were the hell can I find a "S" here for ROS or DOS?
> In my opinion the word request starts with an R. So we get ROR or DOR.
>
> > Lastly ACKnowledge that you got the IP address to the offering DHCP
server.
> I agree that the word "Acknowledge" starts with "A". So we get RORA or
DORA.
>
> > SO, ROSA/DOSA is pretty much the same.
>
> DOSA???
>
> Confusing.... :-(
> Robert Pieroth
>
>
>
>
| |
| Froggy 2002-06-22, 6:34 pm |
| "Simon Geary" <simon_geary@hotmail.com> wrote in message news:<pEim8.2415> >
> >
> > > In my study guide, the DHCP protocol is listed as DHCPDiscover,
> DHCPOffer,
> > > DHCPRequest and DHCPAck. This is immediately followed with the hint
> that
> > > ROSA (Request, Offer, Select and Acknowledge) is a good memory tool!
> Seems
> > > to me that DORA (Discover, Offer, Request and Ack) would be more
> > > appropriate.
> > >
> > > So, which is correct: the protocol (DORA) or the acronym (ROSA)?
Simon,
It's both.
Client: Server:
Discover_____________________I
P Lease Request___________Request
Offer________________________I
P Lease Offer_____________Offer
Request______________________I
P Lease Selection_________Selection
Ack__________________________I
P Lease Acknowledgment____Acknowledge
Froggy
| |
| JayDubb 2002-06-22, 6:34 pm |
| Considering he is asking in a Microsoft newsgroup, he got a Microsoft answer.
DHCP message nomenclature is:
DHCPDISCOVER
DHCPOFFER
DHCPREQUEST
DHCPACK
Make any acronym you want, but creating it from the actual message names makes
the most sense to most people. However, if it makes you feel any better, you
can use the acronym 'SHIT':
DHCP- SHOUT_IT_OUT_TO_ALL_SERVERS_LI
STENING (discover)
DHCP-HERE_YOU_GO_SAY_THE_SERVERS (offer)
DHCP- I'LL_TAKE_THIS_ONE_SAYS_THE_CL
IENT (request)
DHCP- TAKE_IT,_IT'S_YOURS_SAYS_THE_S
ERVER (ack)
Feel better now?
Simon Geary wrote:
>
> There is no right answer, all it is is a simple association which helps you
> learn the order of DHCP packets. You can call it whatever the hell you want.
> Associate each step with a different colour and it will do the same job.
| |
| Paul E. Knight 2002-06-22, 6:34 pm |
| NICE,
Very nice..
That one is good.
"JayDubb" <jay@dubb.nowhere.org> wrote in message
news:3C99EB29.824F1FA1@dubb.nowhere.org...
> Considering he is asking in a Microsoft newsgroup, he got a Microsoft
answer.
> DHCP message nomenclature is:
>
> DHCPDISCOVER
> DHCPOFFER
> DHCPREQUEST
> DHCPACK
>
> Make any acronym you want, but creating it from the actual message names
makes
> the most sense to most people. However, if it makes you feel any better,
you
> can use the acronym 'SHIT':
>
> DHCP- SHOUT_IT_OUT_TO_ALL_SERVERS_LI
STENING (discover)
> DHCP-HERE_YOU_GO_SAY_THE_SERVERS (offer)
> DHCP- I'LL_TAKE_THIS_ONE_SAYS_THE_CL
IENT (request)
> DHCP- TAKE_IT,_IT'S_YOURS_SAYS_THE_S
ERVER (ack)
>
> Feel better now?
>
>
>
> Simon Geary wrote:
> >
> > There is no right answer, all it is is a simple association which helps
you
> > learn the order of DHCP packets. You can call it whatever the hell you
want.
> > Associate each step with a different colour and it will do the same job.
| |
| Daniel Wilson 2002-06-22, 6:34 pm |
|
"Robert Pieroth" <robert.pieroth@onlinehome.de> wrote in message
news:OdpeB#M0BHA.1712@tkmsftngp04...
> "Paul E. Knight" <Pauleknight@yahoo.com> schrieb im Newsbeitrag
news:#25JP3G0BHA.2052@tkmsftngp03...
>
> > Make a request of a the targeted DHCP server to get an IP address
> Were the hell can I find a "S" here for ROS or DOS?
> In my opinion the word request starts with an R. So we get ROR or DOR.
>
SELECT an offer & request it -- that way the 2 R's don't get confused.
--
Daniel Wilson, BSCS, MCSE
CompuSoft Solutions and The Worthwhile Company
www.worthwhile.com
Your complete e-business solution partners.
Phone: 864-233-9029 Fax: 509-757-5264
| |
| Roger Abell 2002-06-22, 6:34 pm |
| You have the technically precise: DORA
and you have the functionally stated: ROSA
In point of fact I prefer DORA simply because these
DHCPDiscover, DHCPOffer, DHCPRequest and DHCPAck
_are_ the terms as used in the RFCs for DHCP messages.
--
Roger Abell
MVP (Windows Platform) Associate Expert
The Expert Zone - www.microsoft.com/windowsxp/expertzone
"Jim Burton" <jim.bNuOrStPoAnM@unisys.com> wrote in message
news:a7b6n1$1fq3$1@si05.rsvl.unisys.com...
> In my study guide, the DHCP protocol is listed as DHCPDiscover, DHCPOffer,
> DHCPRequest and DHCPAck. This is immediately followed with the hint that
> ROSA (Request, Offer, Select and Acknowledge) is a good memory tool!
Seems
> to me that DORA (Discover, Offer, Request and Ack) would be more
> appropriate.
>
> So, which is correct: the protocol (DORA) or the acronym (ROSA)?
>
>
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