Comcast Speed Test: Get Accurate Results For Your Internet Speed.Your only real hope of a close accurate speed test is a wired connection. It's a known thing.Īnd then, are you on a fiber or copper network? Copper? You're essentially sharing bandwidth with everyone on your circuit. The random back off timer in your devices means milliseconds are spend wasted.Īll this combined with the fact that your ISP knows you're sending packets to a speed test site, and they are likely to rocket those packets through for you. Plus every other device and every neighbor you have in range are also sending those csma/cd probes to see if they can talk while your device is talking. Why do you think your speed tests do one then the other? Half duplex also inherently runs csma/cd which adds a lot of overhead to your device to send signals. (You can't send and receive at the same time).
Then there is the simple matter that your access point is operating at half duplex. Two devices cannot occupy the same space at the same time. It's a crowded bandwidth and only one single device can talk on any given subfrequency (the 2.4 channel is broken into 14) at any given moment. Microwaves and and fluorescent lights also can cause interference. Cordless phones, Bluetooth, wifi, and more. In the us you can blame the fcc for allocating one chunk of bandwidth (2.4Mhz) for everything.
Then move 10 feet from your wireless access point. It's funny to see people posting all these screen shots with a very clear misunderstanding of how wireless works.Įven if there weren't known iOS 8 wifi issues (the main 4s issue being constant drops and slow initial connectivity) speeds would vary wildly.ĭon't believe me? Speed test with a Laptop.
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