CCSA R81 156-215.81 Reddit Questions

This answer is correct because DES (Data Encryption Standard) is the least secured encryption algorithm among the options given. DES uses a 56-bit key, which is too short and can be easily cracked by brute force attacks1. DES also suffers from other weaknesses, such as weak keys, complementation property, and linear cryptanalysis2.

The other answers are not correct because they are more secured encryption algorithms than DES. 3DES (Triple DES) is an improvement over DES that applies DES three times with different keys, resulting in a 168-bit key3. AES-128 and AES-256 are variants of AES (Advanced Encryption Standard) that use 128-bit and 256-bit keys respectively. AES is considered to be the most secure symmetric encryption algorithm and is widely used for data protection.

What is DES encryption, and why was it replaced?

Data Encryption Standard - Wikipedia

What is 3DES encryption?

[What is AES encryption and how does it work?]

 A firewall can NOT prevent a network bandwidth saturation attack, which is a type of denial-of-service (DoS) attack that aims to consume all the available bandwidth of a target network or device1, p. 9. A firewall can prevent other types of attacks, such as buffer overflow, SYN flood, and SQL injection, by inspecting packets and applying security rules2, p. 11-12. References: Check Point CCSA - R81: Practice Test & Explanation, 156-315.81 Checkpoint Exam Info and Free Practice Test

Detailed Log is not a valid tracking log option in R80.x3. The tracking log options in R80.x are Log, Full Log, and Extended Log45. References: Where is ‘full log’ option in track column, LOGGINGAND MONITORING R80, Logging and Monitoring Administration Guide R80.20

References: Certificate-based authentication is considered to be the more secure and preferred VPN authentication method. It uses digital certificates to verify the identity of the VPN client and server, and provides stronger encryption and mutual authentication. Password-based authentication methods are less secure and more vulnerable to brute-force attacks, phishing, and keylogging. MD5 is a hashing algorithm, not an authentication method. Pre-shared secret is a symmetric key that is shared between the VPN peers, but it can be compromised if it is not changed frequently or stored securely12 References: VPN authentication options, Windows VPN technical guide