<H1><FONT size=2>What is Bandwidth?</FONT></H1>


<FONT size=2>Bandwidth Definition: 1) A term used to describe the throughput capacity of a given network medium or protocol. </FONT></P>


<FONT size=2>2) Bandwidth is the amount of information that can be carried in a given time period (usually a second). The higher the bandwidth, the more data can be transferred in bits per second (bps). </FONT></P>
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<TD class=articletableHdr colSpan=3><FONT size=2>Bandwidth Units of Measurement</FONT></TD></TR>
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<TD><FONT size=2>bit</FONT></TD>
<TD><FONT size=2>Smallest unit of digital information (ones and zeros)</FONT></TD>
<TD rowSpan=6><FONT size=2>Typically used to indicate storage space. Each letter in a document requires 1 byte of storage. Most hosting providers express data transfer in 'GB per month' for virtual, VPS and dedicated hosting plans. They usually equate 1 GB = 1000 MB.</FONT></TD></TR>
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<TD><FONT size=2>byte</FONT></TD>
<TD><FONT size=2>A set of 8 bits</FONT></TD></TR>
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<TD><FONT size=2>KB</FONT></TD>
<TD><FONT size=2>1024 bytes</FONT></TD></TR>
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<TD><FONT size=2>MB</FONT></TD>
<TD><FONT size=2>1024 KB</FONT></TD></TR>
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<TD><FONT size=2>GB</FONT></TD>
<TD><FONT size=2>1024 MB</FONT></TD></TR>
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<TD><FONT size=2>TB</FONT></TD>
<TD><FONT size=2>1024 GB</FONT></TD></TR>
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<TD><FONT size=2>
</FONT></TD></TR>
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<TD><FONT size=2>bps</FONT></TD>
<TD><FONT size=2>bits per second</FONT></TD>
<TD rowSpan=5><FONT size=2>bits (binary digits) are typically used in data transfer rates. In the Web hosting industry, many Colocation hosting providers express data transfer limits in bits per second.</FONT></TD></TR>
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<TD><FONT size=2>kbps</FONT></TD>
<TD><FONT size=2>kilobits per second = 1000 bits per second</FONT></TD></TR>
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<TD><FONT size=2>mbps</FONT></TD>
<TD><FONT size=2>million bits per second = 1 million bits per second</FONT></TD></TR>
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<TD><FONT size=2>gbps</FONT></TD>
<TD><FONT size=2>gigabits per second = 1 billion bits per second</FONT></TD></TR>
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<TD><FONT size=2>tbps</FONT></TD>
<TD><FONT size=2>terabits per second = 1 trillion bits per second</FONT></TD></TR></TBODY></TABLE>


<FONT size=2>Table 1.3: Bandwidth Units of Measurements</FONT></P>


<FONT size=2>Instead of measuring the total number of GB of data transferred in a given month, many Colocation providers charge for bandwidth using a 'connection average' over the month, measuring the average 'data throughput per second'. For example, 1 mbps means that you can 'average' 1 mbp/s for the month. NOTE: 1 mbps is 1 megabit per second. Different to 'bytes', where 1 byte = a set of 8 bits. </FONT></P>


<FONT size=2>For some excellent information on bandwidth measurements, visit </FONT><FONT color=#985355 size=2>Data Transfer Rates - A Primer</FONT><FONT size=2>. </FONT></P>
<H1><FONT size=2>Bandwidth Billing</FONT></H1>


<FONT size=2>Colocation hosting providers typically choose one of three models to determine how much bandwidth you have used per month. These can be defined as follows: </FONT></P>


<FONT size=2>[A] Throughput Traffic Model » Calculates the amount of data transferred on the server in a 1 month period. The bill represents the customer's actual usage for that month. Measures in GB (Gigabytes). Ask your Colocation provider if they equate 1 GB = 1000 MB or the technically correct 1 GB = 1024 MB. This is good to know if you want accuracy. </FONT></P>


<FONT size=2>[b] Capped Bandwidth Model » Clients buy a 'bandwidth cap' or 'maximum bandwidth' and all traffic is p