100-150 Question 273
Select 4A network administrator has been tasked with ensuring foundational security for a company's network. Which of the following measures align with foundational security concepts?
- A
Implementing access control lists to restrict unauthorized traffic
- B
Using encryption protocols like TLS to protect data in transit
- C
Disabling unused ports and services on network devices
- D
Allowing all traffic through the firewall to ensure availability
- E
Regularly updating firmware and applying security patches
Show answer and explanation
Correct answers: A, B, C, E
Explanation
Foundational security concepts emphasize implementing proactive measures like access control, encryption, reducing the attack surface, and maintaining up-to-date software to protect the network. Allowing unrestricted traffic is a security risk and contradicts these principles.
- A. Correct.
Access control lists (ACLs) are a fundamental security measure used to restrict unauthorized traffic and enhance network security.
- B. Correct.
Encryption protocols like TLS are critical for protecting sensitive data in transit and ensuring confidentiality.
- C. Correct.
Disabling unused ports and services reduces the attack surface, which is a foundational security practice.
- D. Incorrect.
Allowing all traffic through the firewall violates the principle of least privilege and exposes the network to threats, making it incorrect.
- E. Correct.
Regular firmware updates and applying security patches address known vulnerabilities and keep the network secure.