Final answer:
The PC technician should recommend an Intrusion Prevention System (IPS).
Step-by-step explanation:
The security technique the PC technician should recommend for monitoring incoming and outgoing traffic and stopping any malicious activity is Intrusion Prevention System (IPS).
An IPS is a security device that scans network traffic, detects and blocks any suspicious or malicious activities, and prevents unauthorized access to the network. It provides real-time protection against threats such as malware, unauthorized access attempts, and other malicious activities.
Unlike antivirus software, which focuses on detecting and removing specific types of malware, and firewalls, which control network traffic based on predefined rules, an IPS actively monitors network traffic, analyzes packet contents, and identifies and blocks any malicious activity to ensure the security of the network.