112-51の無料問題集（77題）、112-51認定試験参考書

ECCouncil 112-51 問題集

試験コード：112-51

試験名称：Network Defense Essentials (NDE) Exam

最近更新時間：2025-02-18

問題と解答：全77問

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質問 1：
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?
A. S/MIME
B. RADIUS
C. EAP
D. TACACS+
正解：A
解説: (Topexam メンバーにのみ表示されます)

質問 2：
In an organization, employees are restricted from using their own storage devices, and only the company's portable storage devices are allowed. As employees are carrying the company's portable device outside their premises, the data should be protected from unauthorized access.
Which of the following techniques can be used to protect the data in a portable storage device?
A. Data retention
B. Disk mirroring
C. Data encryption
D. Data resilience
正解：C
解説: (Topexam メンバーにのみ表示されます)

質問 3：
Peter, a network defender, was instructed to protect the corporate network from unauthorized access. To achieve this, he employed a security solution for wireless communication that uses dragonfly key exchange for authentication, which is the strongest encryption algorithm that protects the network from dictionary and key recovery attacks.
Identify the wireless encryption technology implemented in the security solution selected by Peter in the above scenario.
A. WPA3
B. WPA
C. EAP
D. WEP
正解：A
解説: (Topexam メンバーにのみ表示されます)

質問 4：
Jessica, a user, wanted to access the Internet from her laptop and therefore sends a connection request to the access point. To identify the wireless client, the access point forwarded that request to a RADIUS server.
The RADIUS server transmitted authentication keys to both the access point and Jessica's laptop. This key helps the access point identify a particular wireless client.
Identify the authentication method demonstrated in the above scenario.
A. Centralized authentication
B. Null authentication
C. Shared key authentication
D. Open system authentication
正解：A
解説: (Topexam メンバーにのみ表示されます)

質問 5：
Finch, a security professional, was instructed to strengthen the security at the entrance. At the doorway, he implemented a security mechanism that allows employees to register their retina scan and a unique six- digit code, using which they can enter the office at any time.
Which of the following combinations of authentication mechanisms is implemented in the above scenario?
A. Smart card and password authentication
B. Biornetric and password authentication
C. Two-factor and smart card authentication
D. Password and two-factor authentication
正解：B
解説: (Topexam メンバーにのみ表示されます)

質問 6：
George, a certified security professional, was hired by an organization to ensure that the server accurately responds to customer requests. In this process, George employed a security solution to monitor the network traffic toward the server. While monitoring the traffic, he identified attack signatures such as SYN flood and ping of death attempts on the server.
Which of the following categories of suspicious traffic signature has George identified in the above scenario?
A. Informational
B. Reconnaissance
C. Unauthorized access
D. Denial-of-service (DoS)
正解：D

質問 7：
Barbara, a security professional, was monitoring the loT traffic through a security solution. She identified that one of the infected devices is trying to connect with other loT devices and spread malware onto the network.
Identify the port number used by the malware to spread the infection to other loT devices.
A. Port 48101
B. Port 110
C. Port 25
D. Port 443
正解：A
解説: (Topexam メンバーにのみ表示されます)

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ECCouncil 112-51 認定試験の出題範囲：

トピック	出題範囲
トピック 1	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.
トピック 2	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.
トピック 3	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.\| 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.\| 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.
トピック 4	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.
トピック 5	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.

参照：https://cert.eccouncil.org/

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