Final answer:
Management decides to use message authentication code (MAC) to prevent masquerading attacks.
Step-by-step explanation:
Management decides to use message authentication code (MAC) to protect network messages. MAC is a cryptographic technique that ensures the integrity and authenticity of a message. It uses a secret key to generate a code that is attached to the message. When the message is received, the recipient can use the same key to verify the code and check if the message has been tampered with.
By using MAC, management is preventing masquerading attacks. In a masquerading attack, an attacker impersonates a user or device to gain unauthorized access to a network. With MAC, the recipient can verify the authenticity of the message and ensure that it is coming from the intended sender.