CND Network Security Controls & Protocols

Question 1

What is the primary purpose of firewalls in network security?

Accepted Answer

To act as a barrier and filter network traffic based on security rules

Answer

Firewalls are fundamental network security devices that monitor and control incoming and outgoing network traffic. They establish a barrier between a trusted internal network and untrusted external networks, filtering data packets based on predefined security rules. This ensures only authorized traffic can pass, protecting the network from unauthorized access and malicious attacks.

Question 2

Which of the following protocols is used to secure communications on the internet?

Accepted Answer

TLS (Transport Layer Security)

Answer

TLS (Transport Layer Security) is a cryptographic protocol designed to provide communication security over a computer network. It is widely used for securing web browsing (HTTPS), email, and other data transfers, ensuring data privacy and integrity between communicating applications. HTTP, FTP, and Telnet are older protocols that either lack inherent security or are less secure.

Question 3

What is the function of Intrusion Detection Systems (IDS)?

Accepted Answer

To monitor and alert on suspicious activities or breaches

Answer

Intrusion Detection Systems (IDS) are security tools that continuously monitor network or system activities for malicious activities or policy violations. When suspicious patterns or known attack signatures are detected, an IDS generates alerts to security personnel. Its primary role is to detect and notify, rather than to actively block traffic.

Question 4

How does Virtual Private Network (VPN) enhance network security?

Accepted Answer

By securing the connection and encrypting data transmission

Answer

A Virtual Private Network (VPN) creates a secure, encrypted connection over a less secure network, such as the internet. It encrypts all data transmitted between the user's device and the VPN server, making it unreadable to unauthorized parties. This ensures privacy and protects sensitive information from eavesdropping and tampering, effectively extending a private network across a public one.

Question 5

Which network security measure is used to authenticate users based on their physical characteristics?

Accepted Answer

Biometric authentication

Answer

Biometric authentication verifies a user's identity based on unique physical or behavioral characteristics. Examples include fingerprints, facial recognition, iris scans, or voice patterns. This method offers a high level of security because biometric traits are difficult to replicate or steal, making it a robust way to authenticate users.

(CND) Certified Network Defender Practice Test

(CND) Certified Network Defender Practice Test

CND Network Security Controls & Protocols