A network that is getting too many random access attempts from IP and MAC addresses that are unknown is said to be currently under attack and these random access attempts are usually from foreign addresses. The network that is under suspicious access can notice these attacks and attempts at gaining access when the internal applications such as firewalls and network access controls detect too much incoming traffic and requests on the network.
The load on the network will also tend to increase when there are too many requests coming in from the outside and putting pressure on the network resources. Your network should stay secured from the outside and any attempts from IP addresses that are unknown should be flagged down and even blocked for the sake of keeping your network safe and secure from intrusion and other types of attacks which are carried out by hackers and other random parties that have seen your network listed out whenever they are scanning your local network.
In the event that you happen to have a wireless network such as a Wi-Fi network, these attempts at gaining access into your network will be much easier to flag down as the initial attempt at a connection will register an address and you get to even see the addresses and sources of the connection attempts which is an excellent means to knowing who is attempting to get on your network and block them or flag their addresses to ensure that your networking software is able to identify the illegal access attempts and ensure that none of them get through to the network.
There are also applications that can be installed on your operating system and the networking hardware to ensure that any attempts at making a connection to your network are scanned and initially filtered to keep out the connection attempts from foreign intruders.
Scanning the network is not a lengthy process and your firewall can be an excellent tool to ensure that you have an overview of all the incoming traffic and any connection attempts that are considered to be suspicious. It is important that you have a powerful firewall with all the settings adjusted to ensure that you have control over all the aspects of the network and clearly can identify the IP addresses of illegal connection attempts as well as keeping them out and filtering the traffic that you do not want to get into your network.
A secure network will be able to carry out its activities as usual and is much easier and cheaper to manage and maintain as it will rarely be attacked or infected which is a good reason to ensure that you manage your network and install the necessary tools and applications to keep it clean and running without any issue affecting it. The network that is well maintained will be able to keep out the unwanted traffic while leaving your internal network users to carry out their activities in peace and even get more productive in the process.