Source: https://www.flowmon.com
Flowmon empowers manufacturers and utility companies to ensure the reliability of their industrial networks confidently to avoid downtime and disruption of service continuity. This can be achieved by continuous monitoring and anomaly detection so that malfunctioning devices or security incidents, such as cyber espionage, zero-days, or malware, can be reported and remedied as quickly as possible.

https://en.wikipedia.org/wiki/Subnetwork
As we can see, we have an IP address of 10.1.4.0 with a subnet mask of /23. According to the question, we need to determine which IP address will be included in the range of the last 100 IP addresses.
The available addresses for hosts start with 10.1.4.1 and end with 10.1.5.254. Now you can clearly see that the last 100 addresses include the address 10.1.5.200.

In CEH v13 Module 11: Hacking Wireless Networks, antenna types are critical for wireless communications, signal strength, and attack range.
Yagi Antenna
A directional antenna designed to operate in VHF (30 MHz to 300 MHz) and UHF (300 MHz to 3 GHz) frequency bands.
Frequently used for point-to-point communication, such as long-distance Wi-Fi or directional signal monitoring.
Offers high gain, narrow beamwidth, and works well for capturing or projecting signals over long distances.
Why Other Options Are Incorrect:
B). Dipole antenna: Typically omnidirectional; less gain; not optimized for long-distance VHF/UHF.
C). Parabolic grid antenna: Used in microwave and satellite frequencies; not suited for 10 MHz-VHF.
D). Omnidirectional antenna: Broadcasts in all directions; used in short-range access points.
Reference:
Module 11 - Antenna Types & Frequencies
CEH iLabs: Wireless Attacks Using Yagi Antenna for Directional Wi-Fi Hacking

Comprehensive and Detailed Explanation From CEH v13 Guide:
Grey-box testing is a hybrid method where the tester has partial knowledge of the internal workings of the system, allowing for a more focused and efficient assessment of security vulnerabilities compared to black- box (no knowledge) and white-box (full knowledge). This approach simulates an insider threat or a user with limited access rights.
CEH v13 Reference:
Module 15: Hacking Web Applications - Types of Penetration Testing
"Gray-box testing assumes partial knowledge of internal structures, combining elements of both black-box and white-box testing."

A Boot Sector Virus infects the master boot record (MBR) of the system. When a system boots, it first loads the MBR into memory. A Boot Sector Virus takes advantage of this by moving the original MBR to a different location on the hard disk and writing itself to the original MBR location. This ensures that it is executed first during system startup.
As per CEH v13 course material:
"A boot sector virus infects the master boot record of a hard disk. It moves the original boot sector to a different location on the hard disk and replaces it with its own malicious code. When the computer is booted, the virus loads first and then hands control to the original boot sector code." Reference - CEH v13 Study Guide:
Module 06: Malware Threats, Section: "Types of Malware", Subsection: "Boot Sector Viruses" Incorrect Options Explained:
* A: Describes directory virus behavior, not boot sector.
* B: The virus moves MBR on the hard disk, not RAM.
* D: Some viruses overwrite MBR, but most preserve the original and move it to another disk location to maintain system operability.