Length of Ethernet

Discussion in 'Apple, Inc and Tech Industry' started by chrisjg, Sep 7, 2009.

  1. chrisjg macrumors newbie

    Joined:
    Aug 29, 2009
    #1
    Hi,

    I just wondered, does the length of ethernet cable you use affect the speed of the internet on your computer?
     
  2. r.j.s Moderator emeritus

    r.j.s

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    Mar 7, 2007
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    Texas
    #2
    No. Unless the cable is longer than 100 meters.
     
  3. r.j.s Moderator emeritus

    r.j.s

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    #4
    Explain ...
     
  4. belvdr macrumors 603

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    Aug 15, 2005
    #5
    It can but it is not noticeable to any human. The difference is most measurable going from 100m down to say 1m. The difference is measureable on a local subnet, but I doubt you would even be able to measure it going through a home router/Internet connection.
     
  5. r.j.s Moderator emeritus

    r.j.s

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    #6
    Yes, there are going to be slight speed differences in drastically different cable lengths - but, like you said, they will not be noticeable to humans.

    In addition, unless the OP's internet connection is faster than 100 Mbps (or 1Gbps, depending on LAN speed), they are not ever going to notice. The bottleneck is the WAN connection, not the LAN.
     
  6. RKO macrumors 6502

    RKO

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    Oct 21, 2008
    #7
    Yes the length of cable can affect speed if it goes beyond the industry accepted 100 meter limit.
     
  7. FX120 macrumors 65816

    FX120

    Joined:
    May 18, 2007
    #8
    It's not like ethernet suddenly brick-walls at 100m on standard copper.

    Sometimes using high quality cable you can run 100-baseTX further than the accepted 100m limit if the run is straight, flat, and in a quiet RF environment.

    Packet loss can be a problem in even short cable runs if the cable is of poor quality, the RF environment is very noisy, and you've looped the cable.
     
  8. johnfernandez macrumors newbie

    Joined:
    Sep 8, 2009
    #9
    Hi..
    Actually I am confused about the question that does the length of ethernet cable affect the speed of the internet or not?May be ethernet cable should longer than 100 meters.There should be slightly speed difference from it.
     
  9. belvdr macrumors 603

    Joined:
    Aug 15, 2005
    #10
    Like I said above, it is measurable when on the same local subnet. However, it is not noticeable by any human. From the tests I've seen, it changes to the tune of milliseconds when going from 100m down to 1m. For an average home internet connections of speeds < 100 Mb, it's likely it couldn't even be measured.
     
  10. angelneo macrumors 68000

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    Jun 13, 2004
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    afk
    #11
    Is there a minimum length of the cable? especially in server farms where sometimes the cables are just used to connect from one rack to the above. I vaguely remember someone telling me there is, not sure if it's true.

    EDIT: found a link stating no minimum length
    http://www.ctrlink.com/2006_07_01_archive.html
     
  11. chrisjg thread starter macrumors newbie

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    Aug 29, 2009
    #12
    How or what is the best way to test the speed of your internet connection both wireless and connected via ethernet?
     
  12. Rodimus Prime macrumors G4

    Rodimus Prime

    Joined:
    Oct 9, 2006
    #13

    The only real minimum is functionality. a 1' cable is near useless just because it is so short it really limits you on what it can be connect to. Hell I could not even connect my router to my PC with a 1' cable if I could it would be really tight and that is with the router sitting on top of the PC. But a 3' cable is useful because it gives me enough slack to work with but not to much that it gets in the way.
    For most desk function a 3'-10' cable can cover it because even with the router on top of my computer 10' of cable is not going to get in the way.

    Now when you get up to 50'-100' range those have suck when using to connect to a router 2-3' away (and yes I have done it because it was all I had on hand)
     
  13. r.j.s Moderator emeritus

    r.j.s

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    #14
    speedtest.net
     
  14. Le Big Mac macrumors 68020

    Le Big Mac

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    Location:
    Washington, DC
    #15
    It *does*--speed of light/electricity and all that. But it's not noticeably. Length can affect signal strength/packet loss, hence the 100m limit per the specs. Longer cables can work but they aren't within "spec" so performance guarantees get tossed.
     

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