Problem Statement: An attacker attacks a known public Apache web server. The attacker gains access to the web server and uploads scripts that send the server’s crucial data to the attacker every minute to maintain access to the server. Finally, the attacker shuts the Apache service at one-minute intervals. Based on the above scenario, answer the following question. The attacker performs a port-scanning operation that targets a web server to gather data about open ports on the system and possibly to identify the service behind these ports. The port scanning operation performed in this scenario is a technique involved in which of the following phases?

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