Friends at CpWebhosting tell us something about bandwidth and various measures to improve on it for a hosting company.
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Tosh
Dedicated Hosting

Bandwidth (data transfer) is usually measured in gigabytes. A gigabyte is roughly one billion bytes.

You should be careful and make sure you always do have some extra bandwidth – many hosts charge $2.00 and more for every gigabyte of transfer you use extra.

Bandwidth is not equal for every connection.It is host dependent.So it is good to test it by yourself by visiting the web host’s page multiple times throughout the day to see how fast their response loads up.

Well i agree with this because a slow loading website could be a sign of a slow and over-loaded internet connection.It also means a lot of wastage of resources.So dont stuck up with such connections.

Always choose a connection with multiple carriers.

Well the pipe size should also be taken into consideration.Its size refers to the speed at which data is transferred.