Data Transmission Flashcards
Router
A device that forwards data packets between computer networks
Bandwidth
The maximum rate of data transfer across a given path
Latency
The time it takes for a data packet to move across network from one point to the other
Protocols
A set of rules that govern data communications
What is bandwidth a measure of
How much data can be fitted on to a cable at any point in time
Bit rate
Is used to describe software’s data transfer requirements
High bandwidth means that there is more room for data than in low bandwidth but ..
The data still flows at the same speed for both bandwidths
What kind of bandwidth does sending a text-based email need? and why?
Low
Emails tend to be only a few kilobytes in size
What kind of bandwidth does streaming a video conference need? and why?
High
Video sends lots of data per second, better quality videos need more data
What kind of bandwidth does a file server need? and why?
High
File servers deal with lots of requests at the same time.
What kind of bandwidth does browsing the web need? and why?
Low
Most webpages tend to have be quite small, They do send lots of data but it is usually over a longer period of time.
What is the internet
It is a world-wide communications infrastructure of interconnected packet-switching networks
How many bytes are in a bit
8
