Slow connection for just one computer even with no firewall.

Hello,
I just bought an iMac. I currently have a macbook and a PC laptop connected to my airport Extreme. My download speeds for the laptops are fine, but the download speed for the imac is less than 1MB/s. Ranging about 400-600kb.sec I've done an internet speed test through my imac and it said it was 15mb/sec for download. Then i tested it with Vuze, it gave me a little over 3Mb/sec. But Vuze also recognized that i was using a router and showed my speed between my imac and airport router was only 418kb/sec.
I checked my rates using Airport utility and it lists my iMac at 216 (i dont know the units), my macbook at 162, and the PC at 54. The imac has the highest rate. both the apple computers are of 802.11a/n type. the PC is of b/g. The firewall is completely turned off. I dont know what the issue.
Any help or ideas???
Thank You

>I checked my rates using Airport utility and it list my iMac at 216 (i dont know the units), my macbook at 162, and the PC at 54.
The AirPort Utility provides the instaneous bandwidth rate that the wireless client is currently connected to the base station ... in Mbps. The iMac (at 216) and MacBook (at 162) are, most likely, connected to the 802.11n AirPort Extreme Base Station's (AEBSn) 5 GHz radio and the PC laptop (at 54) connecting to the 2.4 GHz radio.
The maximum bandwidth limits are:
54 Mbps for 802.11g. This mode is only available on the 2.4 GHz band.
130 Mbps for 802.11n on the 2.4 GHz band
300 - 450 Mbps for 802.11n on the 5 GHz band with wide-channels enabled.
From the bandwidths that you are getting, the iMac is at pretty much full bandwidth on your local wireless network. That would mean transferring data between the iMac and any other device on the local network should experience relatively high data transfer rates.

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G'Day All,
I've raised a question in the following blog, however I would like to open it up to other people as well so they might get something out of it and in the process might share their own thoughts on the matter at hand.
ID-Based Firefighting vs. Role-Based Firefighting
So this is where I am at this point:
From what I can gather so far, my understanding of EAM ID/ROLE based is as follows:
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Better tracking of FF tasks - Specific log reports with Reason Codes. Bonus point from Auditors!
Two Log ins so potential to commit fraud. (1 action using own UserID and 1 action using FFID)
Could be hard to track and find out when a fraud has been committed so can be a problem with auditors.
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      ID Based -> /n/GRCPI/GRIA_EAM : TCode for DCentralised FFighting -> You can see the FFIDs assigned to you
- Role Based: Logs into the remote system only using U.ID, so everything gets logged against that one ID.
Multiple users can use the FFROLE at once.
Firefighter has to exist in every system assigned to them - so multiple logons.
Hard to differentiate between FF tasks and normal tasks as no login required So easy to slip up
Time consuming to track FF tasks - No Specific log reports. No Reason Codes
     R.Based -> GRAC_SPM : TCode for Centralised FFighting -> You will see FFROLEs
     R.Based -> /n/GRCPI/GRIA_EAM : TCode for DCentralised FFighting -> Not applicable so wont work
So based on this there are pros and cons in both however according to SAP only one can be used. To me personally, it makes more sense to get the best of both the worlds right? So here is my question why can’t we just use both?
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    . Normal EAM tasks -> FFRole
Alessandaro from the original post pointed this out:
"Per design it isn't possible to achieve both types of firefighting at the same time. It's a system limitation and hence to configurable."
Well this is what I can't seem to get my head around. For a FFID, there is a logon session so it has to be enabled and as far as I can tell there is no way around it.
However for FFRole, there isn't such limitations/restrictions like starting a separate session. FFRole is just assigned to an end user for him/her to perform those tasks using their own user ID.
So in what way is it different from any of their other tasks/roles, other than the fact that they've got an Owner/Controller assigned to the FFRole? and
What is stopping us from using it when ID based is the default?
If I were to do the following does it mean I can use both ?
    . Config Parameter: 4000 = 1 (GRC System) -> ID Based
    . Config Parameter: 4000 = 2 (Plug-In) - > Role Based
Please excuse me if my logic is a bit silly, Role Based firefighting is only done on Plug-in systems so the following should work just fine:
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However for ID based, it is a Central Logon, so the following is a must:
    . Config Parameter: 4000 = 1 (GRC System) -> ID Based
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Gretchen,
Thank you for thoughts on this.
Looks like I'm failing to articulate my thoughts properly as the conversation seems to be going in a different direction from what I am after. I'll try once more!
My query/issue is not in regards to if/what SAP needs to do about this or why there isn't more support from Companies/Organizations and not even, which one is a better option.
My query is what is stopping us(as in the end users ) from using both ID/Role based at the same time?
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FFID
FFROLE
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John Doe
Jane Doe
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IMG-> GRC-> AC-> Maintain Configuration Settings -> 4000:1 - ID Based
IMG-> GRC (Plug-in)-> AC-> Maintain Plug-In Configuration Settings-> 4000:2 - Role Based
User1
John Doe logs into his regular backend system (ECCPROD001)-> executes GRAC_SPM-> Enters the GRC system (GRCPROD001)-> Because the parameter is set to ID based in the GRC Box, so he will be able to see the FFID assigned to him-> and will be presented with the logon screen-> Logs in -> Enters the assigned system (lets say CRMPROD001) At this point the firefighting session is under progress
User2
Jane Doe logs into her regular backend system (ECCPROD001) -> (can execute GRAC_SPM to check which FF Role has been assigned to her but she can see that in her regular menu, so there is no point) -> Executes the transactions assigned in FFROLEThis is done at the same time while FFID session is in progress
So all I want to know is if this scenario is possible? if the answer is No, then why not?
I physically carried out this scenario in my system and I had no problems(unless I am really missing the plot here), which brings me back to my original question: Why settle for just one?
Again to reiterate I am not getting into the efficacy or merits of this or even if one should use this. Just want to know if it is possible/feasible or not.
So there you have it. That's the whole enchilada(as they say there in Texas). I tried to word my thoughts as concisely as I can, if there are still any clarifications, more information you or anyone else reading this would like, please do let me know.
Regards,
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