SQT: Megabytes and Megabits SQT ：和兆兆字節

There’sa big difference between megabits and megabytes and again between those and megabps, so watch out when you’re buying memory, storage or bandwidth.還有很大差異和兆兆位，並再次與那些和megabps ，所以觀看時，你買的內存，儲存或帶寬。

From first principles, a bit, is a binary digit, a single 1 or a 0 in binary code.從第一原則，位，是一個二進制數字，一個1或0的二進制代碼。 A byte is a word composed of 8 bits, so a byte is 8 times as big as a bit.字節是一個詞組成的8位，所以一個字節是8倍大一點。 A megabit is “approximately” a million bits, whereas a megabyte is a million bytes, or eight megabits; that’s storage space.阿兆位的是“大約” 100萬位，而一個字節是一個百萬字節，或8兆;這是存儲空間。 Megabps in turn is a million bits per second; that’s transfer rate. Megabps又是一個萬比特每秒，這是傳輸速率。

So, if you’ve got an 8Mbps (Megabits per second) connection then you’re going to be able to download one megabyte of information per second at full speed, although that rarely happens.因此，如果您有8Mbps的（兆位每秒）連接然後你將能夠下載一個字節的信息每秒全速，但很少發生。 A 4 minute song is usually compressed as an mp3 to 5 megabytes, so you’d expect that to take about 5 seconds to download, at fullspeed.阿四分鐘歌曲通常是壓縮作為一個MP3到5兆字節，所以你期待這大約需要5秒鐘下載，在fullspeed 。 A whole album of ten tracks at around 5 megabytes each should therefore take less than a minute to download at that rate.整個專輯的10首歌曲約5兆字節，因此每不到一分鐘下載該利率。

When you move on to movie downloads you’re usually talking 700 to 1000 megabytes, which is around one gigabyte (giga meaning million), you can do the calculations yourself on download times.當你進入電影下載通常你說話700至1000兆字節，這是約1千兆字節（千兆含義萬美元） ，你可以計算自己的下載次數。 For more on the many other size prefixes check out the sciencebase post on欲了解更多關於其他許多大小前綴查看sciencebase職位 zepto, yotta, and yocto zepto ， yotta ，並yocto . 。

Of course, ADSL and cable broadband speeds varying depending on load, time of day, distance from your exchange and whether you’re connection is capped or當然， ADSL和有線寬帶速度取決於不同的負荷，時間，距離，您的交流和您是否連接的上限或 throttled扼殺 . 。