A company suspects that an attacker has been attempting to gather sensitive information by intercepting traffic on its wired network. Which of the following measures is MOST effective in preventing the attacker from gaining useful information?
Encrypting the data in transit over the network.
Implementing a firewall between the wired network and external systems.
Disabling all unused services on the network hosts.
Changing the default passwords on network devices.
Encrypting the data in transit on the wired network significantly enhances security, as it renders intercepted traffic unreadable and useless to an attacker without the proper decryption key. Changing default passwords does not prevent traffic interception, although it is a basic security practice. Implementing a firewall helps regulate traffic based on security rules but does not directly prevent data interception. Disabling unused services minimizes potential exploit vectors but would not prevent an attacker from capturing traffic that is already allowed on the network.
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How does encryption work to secure data in transit?
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What are some examples of encryption protocols used for protecting network traffic?
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What measures can complement encryption to enhance network security?