How to find the cause of the internet drop?

Question

Computer networks

Hello, I apologize for the mistakes, Russian is not native.
There is a network. 100 megabits via optics, enters mikrotik rb951ui-2hnd from it into 7 devices and into apple airport extream, there are 2 Wi-Fi networks, one from Mikrotik and the other from Apple, basically the speed is 90 megabits via Wi-Fi.
The problem is that sometimes there are several hourly drawdowns, it is not clear why, the provider said to check the cables and connectors, everything is intact and works perfectly. Then he said that probably there is a virus that eats traffic.
The question is whether this is the problem or something else. If this is how it is understood which device is infected.

Answer 1

The Internet access band has a lot of intermediate nodes, due to which a drawdown can occur. The provider promises you speeds up to 100Mbps (unless you are a legal entity with an appropriate contract for a guaranteed bandwidth from the provider), and then only within your network. If some service on the Internet slowly gives data, then the provider is not to blame.
It is also important to understand that wi-fi is an extremely unstable environment - drawdowns are possible due to radio noise.

Answer 2

Mikrotik rb951ui-2hnd has a single-core processor, it does not pull out 7 clients, for example, MikroTik hAP ac2 has a quad-core ARM, and it will pull out 30

Answer 3

To understand which device is infected, it can be scanned using an antivirus program.
From the traffic side, you can see the current channel load on any device - you need to analyze who exactly creates it - connect to all your devices and look for anything suspicious - when you find it, you can determine by ip address what kind of device.

Answer 4

Can someone download torrents on the rayot?

Answer 5

First you need to find a place where this very speed is cut off.
If the problem is reproducible, then we look at the traffic on the external mikrotik interface and try to load it additionally (with a wired client). If you can load it, then it's not the provider.

Answer 6

If you yourself cannot or do not want to scan your PC for viruses and catch the channel loading on your equipment, try requesting details from your provider for an approximate period - at least you will understand whether your channel was loaded, or if there were drawdowns on a free channel