What is a critical step in ensuring the safe integration of two corporations' networks?

Conducting a thorough security assessment is essential when integrating two corporations' networks because it identifies vulnerabilities, regulatory compliance needs, and gaps in security measures that could be exploited during the integration process. This step allows security experts to understand the existing security postures of both networks, assess the risks involved with merging them, and ensure that any potential weaknesses are addressed before the integration occurs.

Performing a security assessment is crucial since it informs subsequent decisions, such as how to update firewall configurations and whether user training is necessary. It serves as a foundational step for integrating systems securely, ensuring that all security protocols are effective and up to date, and aligning both organizations on security policies, which can help prevent data breaches or other security incidents during the transition.