This is a part of network management that involves the constant monitoring (i.e. all day long) of a computer network to check for poor servers, its availability and uptime, user activities, network connections and generally any other thing using some parameters like response time, etc.
Network monitoring tools can help you identify specific activities and performance metrics, whose results can be used by your business for diverse purposes which could be stopping internal security threats, meeting compliance requirements, etc. Network monitoring tools can measure both wireless and wired networks, virtual private networks (VPN), local area networks (LAN) and wide area networks (WAN). Network monitoring tools have also been in-built in some mobile operating systems like Android. This feature is called DATA USAGE in android and can be accessed either from the phone settings or from the notification bar on the top of the android screen. The screenshot below is from an android data usage monitor.
There are many arguments for and against the importance of monitoring network performance, but it is ideal for a firm to monitor its network as the data gotten from network monitoring can be used in
#1 proper planning on how to run the firm in future.
#2 it helps a firm to know whether services provided meet a certain standard, from which its availability can be ensured and problems pinpointed.
#3 it can be used for further analysis of how people use the internet, the most used device on the internet and for other statistical data analysis,
Network monitors can take proper account of different data depending on what you want it to measure.
It can measure the following:
#1 the number of different mobile and pc operating systems that access the network, like the number of android Smartphone or the number of Macintosh pc that access the network.
#2 the internet protocols (IP) of different devices that access a network.
#3 locations of these devices.
There are so many network monitoring tools out there on the web. Some are open source while some are purchased. To maximally utilize any of them, it is advisable to research more on them and know there applications and the way they work, this will ensure that you don’t apply them where they don’t function well, i.e. to avoid misapplication. Below are some network monitoring tools:

To know more about this, visit the source website: www.researchersportal.org/2016/04/the-art-of-network-monitoring-about.html