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Eccouncil 112-51 Exam Questions
- Topic 1: Network Security Fundamentals: This component assesses an IT professional's knowledge of the principles behind network security, as well as the dangers and weaknesses connected to networks. This section aims to provide network engineers and security experts with an understanding of the various network security protocols, their purposes, and the ways in which they contribute to the overall security of the network.
- Topic 2: Identification, Authentication, and Authorization: This part addresses the basic concepts, jargon, and models associated with identifying, authenticating, and authorizing users and systems in a network environment. It is intended for security administrators and access control managers.
- Topic 3: Identity and Access Management (IAM) Concepts: An overview of IAM concepts, components, and their function in network resource security is given in this section for security architects and IAM administrators.
- Topic 4: Administrative Controls for Network Security: This section gives an overview of IAM ideas, components, and its function in network resource security for security architects and IAM administrators.
- Topic 5: Administrative Controls for Network Security: This section addresses the creation and application of security policies, standards, processes, and recommendations for compliance officers and security policy makers to safeguard network assets. It also entails being aware of the legal and regulatory frameworks around network security.
- Topic 6: Physical Controls for Network Security: This section highlights the significance of physical security measures for safeguarding network infrastructure and data, especially for physical security workers and building managers. It addresses several physical security measures and how to apply them.
- Topic 7: Technical Controls for Network Security: This section is intended for network engineers and security architects and focuses on technical safeguards for network systems and data.
Free Eccouncil 112-51 Exam Actual Questions
Note: Premium Questions for 112-51 were last updated On May. 23, 2026 (see below)
Below is the list of encryption modes used in a wireless network.
1.WPA2 Enterprise with RADIUS
2.WPA3
3.WPA2 PSK
4.WPA2 Enterprise
Identify the correct order of wireless encryption modes in terms of security from high to low.
Explore
The correct order of wireless encryption modes in terms of security from high to low is 2 -> 1 -> 4 -> 3. This is based on the following comparison of the wireless encryption modes:
WPA3: WPA3 is the latest and most secure wireless encryption mode, introduced in 2018 as a successor to WPA2. WPA3 uses the AES encryption protocol and provides several security enhancements, such as stronger password protection, individualized encryption, forward secrecy, and protection against brute-force and dictionary attacks. WPA3 also supports two modes: WPA3-Personal and WPA3-Enterprise, which offer different levels of security for home and business networks. WPA3-Personal uses Simultaneous Authentication of Equals (SAE) to replace the Pre-Shared Key (PSK) method and provide more robust password-based authentication. WPA3-Enterprise uses 192-bit cryptographic strength to provide additional protection for sensitive data and networks123.
WPA2 Enterprise with RADIUS: WPA2 Enterprise with RADIUS is a wireless encryption mode that combines the security features of WPA2 Enterprise and the authentication features of RADIUS. WPA2 Enterprise is a mode of WPA2 that uses the AES encryption protocol and provides stronger security than WPA2 Personal, which uses the PSK method. WPA2 Enterprise uses the 802.1X standard to implement Extensible Authentication Protocol (EAP) methods, such as EAP-TLS, EAP-TTLS, or PEAP, to authenticate users and devices before granting access to the network. RADIUS is a protocol that allows a central server to manage authentication, authorization, and accounting for network access. RADIUS can integrate with WPA2 Enterprise to provide centralized and scalable authentication for large and complex networks, such as corporate or campus networks .
WPA2 Enterprise: WPA2 Enterprise is a wireless encryption mode that uses the AES encryption protocol and provides stronger security than WPA2 Personal, which uses the PSK method. WPA2 Enterprise uses the 802.1X standard to implement Extensible Authentication Protocol (EAP) methods, such as EAP-TLS, EAP-TTLS, or PEAP, to authenticate users and devices before granting access to the network. WPA2 Enterprise is suitable for business or public networks that require individual and secure authentication for each user or device .
WPA2 PSK: WPA2 PSK is a wireless encryption mode that uses the AES encryption protocol and provides better security than WEP or WPA, which use the TKIP encryption protocol. WPA2 PSK uses the Pre-Shared Key (PSK) method, which means that all users and devices share the same password or passphrase to join the network. WPA2 PSK is easy to set up and use, but it has some security drawbacks, such as being vulnerable to brute-force and dictionary attacks, or having the password compromised by a rogue user or device. WPA2 PSK is suitable for home or small networks that do not require individual authentication or advanced security features .
Wi-Fi Security: Should You Use WPA2-AES, WPA2-TKIP, or Both? - How-To Geek, How-To Geek, March 12, 2023
WiFi Security: WEP, WPA, WPA2, WPA3 And Their Differences - NetSpot, NetSpot, February 8, 2024
What is WPA3? And some gotchas to watch out for in this Wi-Fi security upgrade - CSO Online, CSO Online, November 18, 2020
[Types of Wireless Security Encryption - GeeksforGeeks], GeeksforGeeks, 2020
[Wireless Security Protocols: WEP, WPA, and WPA2 - Lifewire], Lifewire, February 17, 2021
[WPA vs. WPA2 vs. WPA3: Wi-Fi Security Explained - MakeUseOf], MakeUseOf, January 13, 2021
Sarah was accessing confidential office files from a remote location via her personal computer connected to the public Internet. Accidentally, a malicious file was downloaded onto Sarah's computer without her knowledge. This download might be due to the free Internet access and the absence of network defense solutions.
Identify the Internet access policy demonstrated in the above scenario.
A permissive policy is a type of Internet access policy that allows users to access the Internet from any device and any location, without any restrictions or security measures. A permissive policy provides convenience and flexibility for the users, but also exposes them to various risks, such as malware infection, data leakage, or cyberattacks. In the scenario, Sarah was accessing confidential office files from a remote location via her personal computer connected to the public Internet, and accidentally downloaded a malicious file onto her computer. This indicates that the organization had a permissive policy for Internet access12. Reference: Network Defense Essentials - EC-Council Learning, Internet Access Policy: Definition and Best Practices
John, from a remote location, was monitoring his bedridden grandfather's health condition at his home. John has placed a smart wearable ECG on his grandfather's wrist so that he can receive alerts to his mobile phone and can keep a track over his grandfather's health condition periodically.
Which of the following types of loT communication model was demonstrated in the above scenario?
A device-to-cloud model is a type of IoT communication model that connects the IoT devices directly to the cloud platform, where the data is stored, processed, and analyzed. The device-to-cloud model enables remote access, real-time monitoring, and scalability of IoT applications. The device-to-cloud model requires the IoT devices to have internet connectivity and cloud compatibility. In the above scenario, John used a device-to-cloud model to monitor his grandfather's health condition, as he placed a smart wearable ECG on his grandfather's wrist that sent the data to the cloud platform, where John could access it from his mobile phone and receive alerts periodically. Reference:
Communication Models in IoT (Internet of Things) - Section: Device-to-Cloud Model
IoT Communication Models - IoTbyHVM - Section: Device to Cloud Communication Model
Logical Design of IoT | Communication Models | APIs | Functional Blocks - Section: Device-to-Cloud Communication Model
Below is the list of encryption modes used in a wireless network.
1.WPA2 Enterprise with RADIUS
2.WPA3
3.WPA2 PSK
4.WPA2 Enterprise
Identify the correct order of wireless encryption modes in terms of security from high to low.
Explore
The correct order of wireless encryption modes in terms of security from high to low is 2 -> 1 -> 4 -> 3. This is based on the following comparison of the wireless encryption modes:
WPA3: WPA3 is the latest and most secure wireless encryption mode, introduced in 2018 as a successor to WPA2. WPA3 uses the AES encryption protocol and provides several security enhancements, such as stronger password protection, individualized encryption, forward secrecy, and protection against brute-force and dictionary attacks. WPA3 also supports two modes: WPA3-Personal and WPA3-Enterprise, which offer different levels of security for home and business networks. WPA3-Personal uses Simultaneous Authentication of Equals (SAE) to replace the Pre-Shared Key (PSK) method and provide more robust password-based authentication. WPA3-Enterprise uses 192-bit cryptographic strength to provide additional protection for sensitive data and networks123.
WPA2 Enterprise with RADIUS: WPA2 Enterprise with RADIUS is a wireless encryption mode that combines the security features of WPA2 Enterprise and the authentication features of RADIUS. WPA2 Enterprise is a mode of WPA2 that uses the AES encryption protocol and provides stronger security than WPA2 Personal, which uses the PSK method. WPA2 Enterprise uses the 802.1X standard to implement Extensible Authentication Protocol (EAP) methods, such as EAP-TLS, EAP-TTLS, or PEAP, to authenticate users and devices before granting access to the network. RADIUS is a protocol that allows a central server to manage authentication, authorization, and accounting for network access. RADIUS can integrate with WPA2 Enterprise to provide centralized and scalable authentication for large and complex networks, such as corporate or campus networks .
WPA2 Enterprise: WPA2 Enterprise is a wireless encryption mode that uses the AES encryption protocol and provides stronger security than WPA2 Personal, which uses the PSK method. WPA2 Enterprise uses the 802.1X standard to implement Extensible Authentication Protocol (EAP) methods, such as EAP-TLS, EAP-TTLS, or PEAP, to authenticate users and devices before granting access to the network. WPA2 Enterprise is suitable for business or public networks that require individual and secure authentication for each user or device .
WPA2 PSK: WPA2 PSK is a wireless encryption mode that uses the AES encryption protocol and provides better security than WEP or WPA, which use the TKIP encryption protocol. WPA2 PSK uses the Pre-Shared Key (PSK) method, which means that all users and devices share the same password or passphrase to join the network. WPA2 PSK is easy to set up and use, but it has some security drawbacks, such as being vulnerable to brute-force and dictionary attacks, or having the password compromised by a rogue user or device. WPA2 PSK is suitable for home or small networks that do not require individual authentication or advanced security features .
Wi-Fi Security: Should You Use WPA2-AES, WPA2-TKIP, or Both? - How-To Geek, How-To Geek, March 12, 2023
WiFi Security: WEP, WPA, WPA2, WPA3 And Their Differences - NetSpot, NetSpot, February 8, 2024
What is WPA3? And some gotchas to watch out for in this Wi-Fi security upgrade - CSO Online, CSO Online, November 18, 2020
[Types of Wireless Security Encryption - GeeksforGeeks], GeeksforGeeks, 2020
[Wireless Security Protocols: WEP, WPA, and WPA2 - Lifewire], Lifewire, February 17, 2021
[WPA vs. WPA2 vs. WPA3: Wi-Fi Security Explained - MakeUseOf], MakeUseOf, January 13, 2021
Steve was sharing his confidential file with John via an email that was digitally signed and encrypted. The digital signature was made using the "Diffie-Hellman (X9.42) with DSS" algorithm, and the email was encrypted using triple DES.
Which of the following protocols employs the above features to encrypt an email message?
S/MIME (Secure/Multipurpose Internet Mail Extensions) is a protocol that provides security services for email messages, such as encryption, digital signature, authentication, and integrity. S/MIME is based on the MIME standard, which defines the format and structure of email messages. S/MIME uses public-key cryptography to encrypt and decrypt the message content and to sign and verify the message sender. S/MIME supports various algorithms for encryption and digital signature, such as Diffie-Hellman, DSS, RSA, and triple DES. S/MIME is widely used for secure email communication in various applications and platforms, such as Outlook, Gmail, and Thunderbird. S/MIME is the protocol that employs the features mentioned in the question, namely Diffie-Hellman (X9.42) with DSS for digital signature and triple DES for encryption. Reference:
S/MIME - Week 7: Email Security
S/MIME - Wikipedia
S/MIME Version 3.2 Message Specification
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