You are a system administrator configuring a server to enforce secure communication between client devices and the server. You want to ensure that data transmitted over the network is protected from eavesdropping and tampering. Which logical control technique would you implement?1.0 MarksIntrusion detection system (IDS)Virtual private network (VPN)Biometric authenticationPublic key infrastructure (PKI)Firewall rules

The logical control technique you would implement to ensure that data transmitted over the network is protected from eavesdropping and tampering is Public key infrastructure (PKI).

Here's why:

1. Intrusion detection system (IDS): This is a system that monitors network traffic for suspicious activity and issues alerts when such activity is discovered. While it's an important part of a comprehensive security strategy, it doesn't inherently protect data in transit from eavesdropping or tampering.

2. Virtual private network (VPN): A VPN can provide a secure tunnel for data transmission, making it harder for unauthorized users to eavesdrop. However, it doesn't provide a mechanism for ensuring the integrity of the data.

3. Biometric authentication: This is a method of verifying an individual's identity based on physical or behavioral characteristics. It doesn't protect data in transit.

4. Public key infrastructure (PKI): PKI involves the use of two cryptographic keys: a public key, which is freely available to anyone, and a private key, which is kept secret by the user. The public key can be used to encrypt data, but the data can only be decrypted with the private key. This ensures both the confidentiality and integrity of the data in transit.

5. Firewall rules: These are used to control network traffic, blocking or allowing specific types of traffic based on an organization's security policies. While they can help protect a network from unauthorized access, they don't protect the integrity and confidentiality of data in transit.

So, the best answer is Public key infrastructure (PKI).