Answer:
Firewall.
This technology allows the network administrator to block access from a specific IP address to the network resources. This can be done in different ways depending on the OS used. If you were going to use Windows, you would do as follows:
1. Open 'Control Panel'.
2. Search 'Windows Firewall' and open it.
3. In there, create a new rule which will determine what actions or permissions are going to get blocked.
4. Add the IP address to be blocked.
5. Block the connection.