In computer network and computer science, digital bandwidth or just bandwidth means the amount of data that can be sent from one point to another in a certain period of time. It is measured as a bit rate expressed in bits per second (bits/s) or multiples of it (kbit/s Mbit/s etc.)
Digital bandwidth should not be confused with:
- Network throughput: which is the average rate of successful data transfer through a connection.
- Data transfer: which is the quantity of data transferred over a given period of time.
Bandwidth in web hosting[change | change source]
In web hosting, the term "bandwidth" is often used to describe the amount of data transferred to or from the website within a defined period of time. Another more specific phrase used for this meaning of bandwidth is monthly data transfer.
Web hosting companies often quote a monthly data transfer for a website, for example 500 gigabytes per month. If the total amount of data downloaded from the website in a particular month reaches this limit, the hosting company may shut off further public access to the site.
Internet connections bandwidths[change | change source]
|56 kbit/s||Modem / Dialup|
|11 Mbit/s||Wireless 802.11b|
|54 Mbit/s||Wireless-G 802.11g|
|100 Mbit/s||Fast Ethernet|
|300 Mbit/s||Wireless-N WiFi|
|1000 Mbit/s||Gigabit Ethernet|
|10 Gbit/s||10 Gigabit Ethernet|
Broadband[change | change source]
Sometimes, the word "broadband" is used to mean "high-speed", especially with high-speed internet connections. "Broadband" means "wide band", and suggests high-speed. However, the term is not clear; "high-speed" is more clear. A dial-up telephone connection is most often thought to be low-speed, at less than 56,000 bit/s (bits per second). High-speed is usually 200,000 bit/s or faster. DSL (Digital Subscriber Line) or Cable modem connections are usually high-speed.