Notes

The analogy that comes up is that without real-time instrumental information on "take-off direction, altitude and speed", it is completely unimaginable that an airplane will fly not only on a domestic two-point route but also on an international distance of several thousand kilometers. Cannot do. It's absurd.

Similarly, it is impossible to realize safe and secure network management without real-time network monitoring and understanding of network environment instrument information (SNMP, Syslog information, and fault information).

If your network monitoring system can only guarantee three nines (99.9%), the application based on it can never support four nines (99.99%).

All network services are therefore ultimately fundamental to ensuring network availability and its improvement.

Advantages and disadvantages of network monitoring:

First of all, as an advantage, it is related to why network monitoring is necessary, but it is the advantage of being able to grasp the current location of our network environment that is complicated and continues to change dynamically every day.

The need for this network monitoring tool is strong and has been recognized and actively operated in the IT network industry for 30 years.

The downside is the long learning curve. It takes a lot of learning time due to the understanding and pain of the SNMP protocol, the technical peculiarities (dark arts) of Manager, Agent, OID, MIB.

However, it can be said that it has been favored by the network industry for a long time because the merit is far greater.
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