An important indication that something went wrong is when a server, a PC, a communication link, or any other entity on the network becomes slow, without any logical reason. For example:
- When a server becomes slow, check for hardware and software issues. Check for network problems, and also whether someone is attacking it.
- When a link from a remote office to the center becomes slow, it can be because of the load (constant or sudden), but it can also be because of an attack that blocks it (usually DOS/DDoS).
- When a PC becomes slow, it can be because it is doing something that you know about, but there is not just one possibility. Check for the things you don't know.
It is important to mention here that there are various systems ...