100-160 Question 52
Select 3A company’s network administrator notices unusual traffic patterns on the network. Upon investigation, they discover that unauthorized devices are connecting to the network and attempting to access internal resources. Which of the following basic network security measures can help prevent unauthorized devices from gaining access in the future?
- A
Implementing MAC address filtering on the network
- B
Configuring a firewall to block all outgoing traffic
- C
Enabling network access control (NAC) to verify device compliance
- D
Using strong passwords for Wi-Fi and network devices
- E
Disabling DHCP on the network to prevent automatic IP address assignment
Show answer and explanation
Correct answers: A, C, D
Explanation
Preventing unauthorized devices from accessing a network requires implementing basic network security measures such as MAC address filtering, network access control (NAC), and ensuring strong passwords for network devices and Wi-Fi. These measures help to verify and restrict access to authorized devices, reducing the risk of unauthorized access attempts.
- A. Correct.
MAC address filtering can restrict access to the network by only allowing devices with approved MAC addresses to connect. This is a basic measure to prevent unauthorized devices.
- B. Incorrect.
Blocking all outgoing traffic with a firewall is not a practical solution as it would disrupt legitimate communication and does not directly address the issue of unauthorized device connections.
- C. Correct.
Network access control (NAC) ensures that only compliant and authorized devices can access the network. It is a key security measure to prevent unauthorized access.
- D. Correct.
Using strong passwords for Wi-Fi and network devices helps secure the network by reducing the risk of unauthorized access through brute force or guessing attacks.
- E. Incorrect.
Disabling DHCP is not an effective solution in this scenario as it does not directly prevent unauthorized devices from attempting to connect to the network.