Folks, there is a something that always confuse us. The speed of Internet provided by our ISPs and the mismatching downloading and surfing speed. It says that your speed is 2Mbps but the files are downloaded at max 200 KBps. Well here is the answer- Mb/s means megabits per second. To convert to megabytes (MB), you simply divide by 8, since there are 8 bits in a byte: 2Mb/s = 2Mb/s * 1Mb/8MB = 0.25MB/s = 250 kB/s So you can theoretically cap out at just under 250 kilobytes per second. Actually the internet service providers mentioning our internet speed in bits per second and so does the speedtest website. Line speeds are measured in decimal units and in bits per second. Data transfer rates are measured in binary units and bytes per second. Also, the line doesnt just carry data, it has to carry address and control information as well. The overhead of the line encoding is already figured in, but the overhead of control and address information is not. So if you have a 2Mbps DSL service, that means your line carries 2,000,000 bits per second. You divide by 8 to get bytes per second, or 250,000. You can then divide by 1,024 to get kilobytes per second, or 244KB/s. TCP over DSL has a maximum efficiency of about 95%, so multiply by 0.95 to get 232KB/s. So a 2Mbps DSL line would be expected to provide a maximum download speed of 232KB/s.
Posted on: Mon, 15 Sep 2014 00:20:48 +0000
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