Eccouncil 112-51 Exam Dumps

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112-51 Pack
Vendor: Eccouncil
Exam Code: 112-51
Exam Name: Network Defense Essentials Exam
Exam Questions: 75
Last Updated: August 23, 2026
Related Certifications: Network Defense Essentials
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Free Eccouncil 112-51 Exam Actual Questions

Question No. 1

John is working as a network administrator in an MNC company. He was instructed to connect all the remote offices with the corporate office but at the same time deny communication between the remote offices. In this process, he configured a central hub at the corporate head office, through which all branch offices can communicate.

Identify the type of VPN topology implemented by John in the above scenario.

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Correct Answer: B

A hub-and-spoke topology is a type of VPN topology that connects multiple remote offices to a central hub, usually the corporate head office, through VPN tunnels. The hub acts as a gateway for the remote offices to access the corporate network resources. However, the remote offices cannot communicate with each other directly, and have to go through the hub. This topology reduces the number of VPN tunnels required, but also increases the load and latency on the hub. In the scenario, John configured a central hub at the corporate head office, through which all branch offices can communicate, but denied communication between the remote offices. Therefore, the type of VPN topology implemented by John is hub-and-spoke12. Reference: Network Defense Essentials - EC-Council Learning, Network Design Scenario #3: Remote Access VPN Design - Network Defense Blog


Question No. 2

Robert, an ISP, was instructed to provide network connectivity to all areas even if some locations are inaccessible to capture direct signals from wireless access points. In this process, Robert used a wireless network component that takes a signal from one access point and boosts its signal strength to create a new network.

Identify the component of the wireless network employed by Robert in the above scenario.

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Correct Answer: D

A wireless repeater is a wireless network component that takes a signal from one access point and boosts its signal strength to create a new network. A wireless repeater can extend the range of a wireless network by repeating the signal from the original access point. This way, the wireless repeater can provide network connectivity to areas that are inaccessible to capture direct signals from the access point. In the scenario, Robert used a wireless repeater to provide network connectivity to all areas12. Reference: Network Defense Essentials - EC-Council Learning, Understanding the Wireless Network Components


Question No. 3

Which of the following IDS components analyzes the traffic and reports if any suspicious activity is

detected?

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Correct Answer: B

The IDS component that analyzes the traffic and reports if any suspicious activity is detected is the network sensor. A network sensor is a device or software application that is deployed at a strategic point or points within the network to monitor and capture the network traffic to and from all devices on the network. A network sensor can operate in one of two modes: promiscuous or inline. In promiscuous mode, the network sensor passively listens to the network traffic and copies the packets for analysis. In inline mode, the network sensor actively intercepts and filters the network traffic and can block or modify the packets based on predefined rules. A network sensor analyzes the network traffic using various detection methods, such as signature-based, anomaly-based, or reputation-based, and compares the traffic patterns with a database of attack signatures or a model of normal behavior. If the network sensor detects any suspicious or malicious activity, such as a reconnaissance scan, an unauthorized access attempt, or a denial-of-service attack, it generates an alert and reports it to the IDS manager or the operator. A network sensor can also integrate with a response system to take appropriate actions, such as logging, notifying, or blocking, in response to the detected activity123. Reference:

Network Defense Essentials Courseware, EC-Council, 2020, pp. 3-33 to 3-34

Intrusion Detection System (IDS) - GeeksforGeeks, GeeksforGeeks, 2020

Intrusion detection system - Wikipedia, Wikipedia, March 16, 2021


Question No. 4

Which of the following layers of loT architecture employs protocols and networks for connecting, sending, and receiving data between devices and network?

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Correct Answer: C

The communication layer of IoT architecture employs protocols and networks for connecting, sending, and receiving data between devices and network. The communication layer is responsible for enabling data exchange among the IoT devices and the cloud or other devices. The communication layer can use various types of networks, such as wired, wireless, cellular, or satellite, and various types of protocols, such as TCP/IP, MQTT, CoAP, or ZigBee12. Reference: Network Defense Essentials - EC-Council Learning, IoT Architecture: The 4 Layers of an IoT System


Question No. 5

Daniel, a networking specialist, identifies a glitch in a networking tool and fixes it on a priority using a system. Daniel was authorized to make a copy of computers programs while maintaining or repairing the system.

Which of the following acts was demonstrated in the above scenario?

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Correct Answer: B

The DMCA is a US law that aims to protect the rights of digital content creators and owners. It prohibits the unauthorized copying, distribution, modification, or circumvention of digital content, such as software, music, movies, etc. The DMCA also provides exceptions for certain purposes, such as fair use, research, education, or maintenance and repair of systems. In the scenario, Daniel was authorized to make a copy of computer programs while maintaining or repairing the system, which falls under the DMCA exception for system maintenance and repair12. Reference: Network Defense Essentials - EC-Council Learning, Network Defense Essentials (NDE) | Coursera


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