I've got a question on getting 1 Gbit/s on my D-Link DGS-1005A. I managed to test getting 1 Gbit/s (&gt;700 Mbit/s) connections on my PC, but now it's stuck at 100 Mbit/s. Fiddling with my Ethernet controller doesn't give me a 1000 Mbit/s full duplex mode, previously set to auto-negotiation. So where do I go for this? I've already checked  for the list, but I don't see something for home users ( is business teams).
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I see a lot of desktop admin questions being migrated to Super User.  Are we positing that enterprise desktop support belongs on Super User?  To me it's just as valuable for Server Fault to have information on things like troubleshooting a  on Windows XP on Server Fault because the troubleshooting steps for a desktop BSoD and a server BSoD are the same.  To me, Super User was put out as the consumer/non-business version of Server Fault.
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Ideally, I'd like to hear of an application to show how much bandwidth each application is consuming on my local Windows PC. Alternatively, instructions to use any other application for this purpose. The simpler the better. Something that works for Windows 2000/XP/Vista/7 (if possible).  Any ideas? Thanks.
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It seems to be an "old" wives tale that, when using a wireless-N router in "mixed mode" to support legacy 802.11b or 802.11g devices, the performance of 802.11n clients will suffer.      claim that when running in mixed-mode, all (some?) N clients run at G speeds.   make the same claim, but say it only happens when a G client is connected.    say N clients run faster, but still run about 30% slower than if the router were in N-only mode, even if there are no legacy B/G clients connected.    claim there is no speed drop for N clients when running on a mixed-mode network.  They say the only issue is that overall network throughput will be lower, because only one client can be transmitting at any time, so some of that transmission time must be shared with the legacy B/G clients running at lower speeds, reducing the overall throughput from what it would be if there were only N clients connected.    So, which is it?  Will running in mixed-mode slow down my network, even if there are no B/G clients?  If I'm running N, will having another client connected at B/G slow me down substantially vs. if they were running N?
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Is there a way to benchmark how fast my router is connected to my PC, independent of the internet?  I've had slower-than-usual internet-based benchmarks, and I'm having a hard time figuring out if it's because of a bad router-to-PC connection (interference, bad signal, etc.) or if it's indeed because my internet is actually slower.
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Right now I'm in the process of possibly switching from a Cable provider to a DSL provider.  I  have both connections live, and before I cancel one or the other, I'm wanting to do some exhaustive testing of the internet connection.  I have three major questions:   What are some approaches that I can quantitatively test the speeds (both up and down) and quality of my internet connections (ping, time connection is down, etc,.)?   Are there other consideration that should be taken when testing an internet connection?   Are there any tools that can do this automatically and capture results?   Note: if you decide to suggest a piece of software, please  in doing so.  Also I'm looking to be able to save any data from the software for detailed analysis and comparison  Overall, I'm looking to compare the two connections over multiple periods of time such as peak hours (1600 - 2100 in my area), and with different loads such as streaming movies, uploading files, etc,.         This question was Featured in the blog!    Read the  for more details or  yourself
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I can't connect to  or  &mdash; the initial connection times out every time. I check this every week, and it worked fine last time, so it must be something pretty recent. (Further HTTPS deployment?)
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Recently I wanted to transfer some movie files (ranging from 1gb to 4.5gb) from one computer on the ground floor to another on the first floor.   The wifi router Im using is this one most likely:    The speed at which I am able to transfer averages around 1Mb/s.  How can I make it faster.  Both the laptops that I am using for transfer are relatively new so the wifi adapters in them cant be too slow. None of the hard drives in the laptops are SSD but I still would like to know how I can increase the transfer speed.  Also the wifi signals on the laptop arent too bad.  Thanks.
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This is an attempt to craft a good general question and answer for a topic that's been asked before, but only in specific situations.    Could you describe what I need to know, prior to laying out a PCB board for a differential signal pair with a specified "differential impedance"?  Differential pairs are used for various high speed serial buses, including USB, MIPI, RS-422, RS-485, PCI Express, DisplayPort, LVDS, HDMI and more.  What's the definition of "differential impedance"? On a PCB board, do I need to twist or alternate the wires, as is done for differential pairs in a cable?  Is the impedance of each length matched trace half the "differential impedance", or is it more complicated that that?  How close must length matching be, given the maximum signal frequency?  References that may be of help:
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How / can you connect Ethernet devices together without magnetics? How do you wire it up? What sorts of practical limitations are there on doing this?  To clarify, I'm not trying to connect two computers here. I'm thinking specifically of creating a small network of microcontrollers on a single board. Lets say the total length of a network segment is no longer than 6 inches. This would be for 10BaseT or at most 100BaseT.
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I have to a get a very simple data entry website up and running. This website will be accessed by only a few people at a time (at most), but usually only one person, and not very frequently - maybe a coupel hours at a time, not every day.  I really don't want to pay for hosting if I don't have to. I have AT&amp;T U-Verse Internet Service.   How feasible is it for me to setup a simple Windows/IIS website on my home network that can be accessed publicly? What's the minimum Internet speed I would need? How can make sure that the IP Address for the public website is static, so I can setup my DNS and forget about it?  Any additional thoughts or suggestions on this type of setup would be greatly appreciated. If this is not feasible, or easy, I will likely just go with a hosting service, and I already have one picked out, so I don't need any suggestions for this.
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Anyone have any idea what one would connect with this cable?  Going from a 15-pin VGA connector to a DB9 is very odd.      The reason I ask is that in an effort to get some hardware that required a serial connection for use up and running at a remote site, the local support person went our and found one of these things.  Obviously plugging the VGA port into a serial port is not going to work but they must have seen too many movies where folks just plugs things in and all is well.  In this case, the hardware was made... non-functional.
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As the photo shows, the pins are wired "straight across", rather than diagonally. This means that it does not work as an Ethernet/8P8C coupler because the transmit pins are  (for 10/100 Mbit/s at least). Likewise, it doesn't act as a crossover either.  Is it wired wrong? Or is it a special form of a 1000Base-T crossover? Or is it perhaps used to correct the pins from another reversed device...?
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A Ethernet cable has 4 pairs of data lines. In normal conditions only two pairs are used, one as a Tx pair and another as Rx pair. So two pairs are left unused. Is it possible to make use of these 2 pairs to carry another independent connection?  Of course I am expecting some obstacles. Maybe it will lead to a lot of noise and subsequent signal degradation. Can this be avoided by using a different color code?  It should be noted that I am not using Gigabit hardware. I just have 10 Mbps. So if I give this a try, will my connection speed be further reduced?   Another reason why this solution will be great is because I have only one power outlet in my room.
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I work at an e-commerce based business in a 16k warehouse. The only available ISP solution is AT&amp;T, with each 6Mb/1.5Mb line costing $50 and fiber optic being an option for $800/mo at 20Mb/20Mb.  Around 15 clients are wired throughout the offices, and another 10 or so exist wirelessly.  I know very little about the stack as it was setup before I arrived, but I am very aware of the real problem we have: it's slow. I don't know if it is download (SpeedTest shows 18Mb down), upload (I was told you can only combine download speeds, not uploading speeds, so SpeedTest shows 1.5Mb) or latency (SpeedTest does not show anything abnormal).  We are using a PepLink to load balance the 3 lines into one solution, but I fear it may be set up incorrectly. I don't know how else to explain why the lag that exists is randomly occurring.  What are common solutions here?  Any help is appreciated. Thanks!
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A big German ISP (Telekom) recently decided to volume limit their DSL internet connection to 75GB per month.  Now I would like to know how much I download / upload. I use Linux Mint 14 Nadia and I have a D-LINK DI-524 router.  How can I get the amount of data I upload / download per month?
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I have a serial comms project coming up.  A number of boards with RS-485 interfaces need to communicate.  Date rate is 57600bps and cable length will be less than a few hundred feet.  Will shielded CAT5 cable work well enough in this situation or should I pay the extra for "true" RS-485 cable such as ?    I cannot easily visit the install site ahead of time as it's interstate.  I do have the same boards here in the lab I can test with however.
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This question:  ""  Solves the question with a call to dig:  dig +short myip.opendns.com @resolver1.opendns.com;   that is the fastest resolution possible, as it involves a single udp packet.  However, that is only one site: OpenDNS, Is there any alternative?  And, makes use of dig, that is not available by default. Again, Is there an alternative?    Note: I needed to solve this problem as the OpenDNS service didn't work locally due to a (also local) redirect of port 53. I finally found out the reason (I had forgotten about the redirect). First, by using this command to find if dnssec is working (locally missing ad flag):  dig pir.org +dnssec +multi   And also using this command to find out if your ISP is redirecting OpenDNS resolutions:  host -t txt which.opendns.com 208.67.220.220   If being redirected, you will get an answer of: "I am not an OpenDNS resolver."