EC-Council Certified Network Defender CND 312-38 Exam Questions

Answer : B

The log entry%ASA-6-11008indicates that the message is of a severity level 6, which corresponds to an informational message. In the context of Cisco ASA Firewall logs, severity levels range from 0 (emergency) to 7 (debugging), with lower numbers indicating higher severity. A severity level of 6 is used for messages that provide information about normal but significant events. In this case, the log indicates that a user named 'enable_16' executed the 'configure term' command, which is a noteworthy event but does not indicate an error or critical condition.

Answer : A

In MacOS, security-related logs are typically stored in the/private/var/logdirectory. This location is used to store various system logs, including authentication attempts and other security events. Thesecure.logfile within this directory is particularly relevant for tracking security incidents, as it records authentication attempts and other security-related events.It's important for network defenders like Rosa to be familiar with these log locations to monitor and respond to potential security issues on the systems they manage12.

Answer : B

The Internet Control Message Protocol (ICMP) operates at the network layer and is integral to the Internet Protocol suite. It is utilized primarily for error handling during packet delivery, such as informing senders of a failed delivery due to unreachable destinations or other path-related issues. ICMP is also used for diagnostic purposes, with tools like ping and traceroute relying on ICMP messages to test connectivity and trace packet routes. Unlike transport layer protocols like TCP or UDP, ICMP does not establish a connection before sending messages, making it a connectionless protocol. This characteristic allows ICMP to quickly relay error messages and network information without the overhead of establishing a session.

Answer : B

Asymmetric encryption, also known as public-key cryptography, uses a pair of keys---a public key and a private key---to encrypt and decrypt data. This method is widely used for securing small amounts of data, such as digital signatures. In asymmetric encryption:

The public key is used to encrypt the data.

The private key is used to decrypt the data.

Digital signatures utilize asymmetric encryption to ensure the integrity and authenticity of a message. When a sender signs a document with their private key, the recipient can verify the signature using the sender's public key, confirming that the document was indeed signed by the sender and has not been altered.

EC-Council Certified Network Defender (CND) Study Guide

Cryptography and Network Security Principles

Answer : D

RAID level 50, also known as RAID 5+0, combines the features of RAID 5 and RAID 0. It requires a minimum of six drives and offers high fault tolerance and high speed for data read and write operations. RAID 50 arrays are created by striping data across RAID 5 arrays, which are themselves striped sets with distributed parity.This configuration provides both the speed of RAID 0 and the redundancy of RAID 51.

The TechTarget article on ''RAID 50: How to select the right RAID level'' explains that RAID 50 is suitable for applications that require high reliability and can handle high request rates and high data transfer, with a lower cost of disks than RAID 101.

The DNSChecker RAID Calculator mentions that RAID 50 requires a minimum of six disks2.

Answer : A

The situation described involves an insider using a packet crafting tool that generated malformed TCP/IP packets, resulting in the crash of the main server's operating system and restricting employee access. This scenario is indicative of a Denial of Service (DoS) attack. A DoS attack aims to make a machine or network resource unavailable to its intended users by temporarily or indefinitely disrupting services of a host connected to the Internet. Malformed packets can cause systems to crash, thereby denying service to legitimate users.

Answer : D

Business Impact Analysis (BIA) is the process that determines the potential impacts of business function disruptions and gathers information needed to develop recovery strategies. A critical part of BIA is examining Recovery Point Objectives (RPOs) and Recovery Time Objectives (RTOs) for a disaster recovery strategy. RPOs define the maximum age of files that must be recovered from backup storage for normal operations to resume after a disaster, while RTOs specify the maximum amount of time that a resource can remain unavailable after a disaster.