A+Fadavi

[|Arash Fadavi]

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> i love austin. its a realy beautiful city and i love to visit it.

 **Bandwidth:** noun

**Definition:** Bandwidth refers to how much data you can send through a network or modem connection. It is usually measured in bits per second, or "bps." You can think of bandwidth as a highway with cars travelling on it. The highway is the network connection and the cars are the data. The wider the highway, the more cars can travel on it at one time. Therefore more cars can get to their destinations faster. The same principle applies to computer data -- the more bandwidth, the more information that can be transferred within a given amount of time.

**1.** The numerical difference between the upper and lower frequencies of a band of electromagnetic radiation, especially an assigned range of radio frequencies. **2.** The amount of data that can be passed along a communications channel in a given period of time.

**1.** Capacity or time. People sometimes use the term very broadly. For example, "there's not enough bandwidth here to get the job done" means there's not enough time or staff. Its technical and true meaning follows. **2.** The transmission capacity of an electronic pathway such as a communications line, [|computer] bus or computer channel. In a digital line, it is measured in bits per second or bytes per second (see [|Mb/sec] ). In an analog channel or in a digital channel that is wrapped in a carrier frequency, [|bandwidth] is the difference between the highest and lowest frequencies and is measured in Hertz (kHz, MHz, and GHz). See [|traffic shaping], [|video bandwidth] and [|bandwidth junkie].

**How it Works:** In computer networks, bandwidth is often used as a synonym for [|data transfer rate] - the amount of data that can be carried from one point to another in a given time period (usually a second). This kind of bandwidth is usually expressed in bits (of data) per second (bps). Occasionally, it's expressed as bytes per second (Bps). A [|modem] that works at 57,600 bps has twice the bandwidth of a modem that works at 28,800 bps. In general, a link with a high bandwidth is one that may be able to carry enough information to sustain the succession of images in a video presentation.

It should be remembered that a real communications path usually consists of a succession of links, each with its own bandwidth. If one of these is much slower than the rest, it is said to be a bandwidth bottleneck.

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How Much Bandwidth Is Enough?
<span style="font-family: Tahoma,Geneva,sans-serif; font-size: 13px;">It depends. Since bandwidth is a significant determinant of hosting plan prices, you should take time to determine just how much is right for you. Almost all hosting plans have bandwidth requirements measured in months, so you need to estimate the amount of bandwidth that will be required by your site on a monthly basis. <span style="font-family: Tahoma,Geneva,sans-serif; font-size: 13px;">If you do not intend to provide file download capability from your site, the formula for calculating bandwidth is fairly straightforward: <span style="font-family: Tahoma,Geneva,sans-serif; font-size: 13px;">If you intend to allow people to download files from your site, your bandwidth calculation should be: <span style="font-family: Tahoma,Geneva,sans-serif; font-size: 13px;">Let us examine each item in the formula: <span style="font-family: Tahoma,Geneva,sans-serif; font-size: 13px;">Usually, hosting plans offer bandwidth in terms of Gigabytes (GB) per month. This is why our formula takes daily averages and multiplies them by 31.
 * <span style="font-family: Tahoma,Geneva,sans-serif; font-size: 13px;">Average Daily Visitors x Average Page Views x Average Page Size x 31 x Fudge Factor
 * <span style="font-family: Tahoma,Geneva,sans-serif; font-size: 13px;">(Average Daily Visitors x Average Page Views x Average Page Size) + (Average Daily File Downloads x Average File Size)] x 31 x Fudge Factor
 * <span style="font-family: Tahoma,Geneva,sans-serif; font-size: 13px;">Average Daily Visitors - The number of people you expect to visit your site, on average, each day. Depending upon how you market your site, this number could be from 1 to 1,000,000.
 * <span style="font-family: Tahoma,Geneva,sans-serif; font-size: 13px;">Average Page Views - On average, the number of web pages you expect a person to view. If you have 50 web pages in your web site, an average person may only view 5 of those pages each time they visit.
 * <span style="font-family: Tahoma,Geneva,sans-serif; font-size: 13px;">Average Page Size - The average size of your web pages, in Kilobytes (KB). If you have already designed your site, you can calculate this directly.
 * <span style="font-family: Tahoma,Geneva,sans-serif; font-size: 13px;">Average Daily File Downloads - The number of downloads you expect to occur on your site. This is a function of the numbers of visitors and how many times a visitor downloads a file, on average, each day.
 * <span style="font-family: Tahoma,Geneva,sans-serif; font-size: 13px;">Average File Size - Average file size of files that are downloadable from your site. Similar to your web pages, if you already know which files can be downloaded, you can calculate this directly.
 * <span style="font-family: Tahoma,Geneva,sans-serif; font-size: 13px;">Fudge Factor - A number greater than 1. Using 1.5 would be safe, which assumes that your estimate is off by 50%. However, if you were very unsure, you could use 2 or 3 to ensure that your bandwidth requirements are more than met.

<span style="font-family: Tahoma,Geneva,sans-serif; font-size: 13px;">**Sources:** <span style="font-family: 'Trebuchet MS',Helvetica,sans-serif; font-size: 13px;">[], [], [], [], [], http://findwebhosting.com/bandwidth-explained/