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Network Performance (1.4b) (Bandwidth (Bandwidth is a measurement of how…
Network Performance (1.4b)
Bandwidth
Bandwidth is a measurement of how much data can be transferred within a period of time.
Bandwidth is divided between all the nodes on the network.
If you are the only one on the network then you should get the maximum bandwidth.
It is not shared evenly, a film being downloaded may take priority over a youtube video.
If you pay more then you will normally get more possible bandwidth.
Speed
Speed is very different to Bandwidth.
Speed is what a single node will experience.
The node speed will change depending on what the other nodes are doing, bandwidth does not.
Contention Ratio
The contention ratio is a measurement of how many people share the bandwidth.
This affects all the network users and all the connected nodes
We pay for a slice of the maximum bandwidth and share it with 30 different users (1:30). Network providers don't tell us this.
Network performance
Network Performance is a measure of how well data is transmitted through a network.
This covers a range of factors such as speed and error rate.
Ethernet is better that WiFi and has less errors.
Network speed measurement
It is measured in bits per second - this is abbreviated to bps.
Data is transmitted 1 bit at a time, this could be incredibly fast.
Common measurements:
Kilo-bits - thousands of bit per second
Megabits - millions of bits per seconds
Gigabits - billions of bits per second
Speed of data transfer is also called the bit rate.