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WGU Cybersecurity Architecture and Engineering (KFO1/D488) Sample Questions (Q27-Q32):

NEW QUESTION # 27
Which block cipher mode of operation for encrypting data is simple and efficient and provides no confidentiality beyond that of the underlying block cipher?

A. Electronic codebook (ECB)
B. Output feedback (OFB)
C. Cipher block chaining (CBC)
D. Counter (CTR)

Answer: A

Explanation:
The correct answer is A - Electronic codebook (ECB).
According to WGU Cybersecurity Architecture and Engineering (KFO1 / D488), ECB mode is the simplest and most basic mode of operation for block ciphers. It encrypts each block of plaintext independently with the same key, but identical plaintext blocks produce identical ciphertext blocks, providing no additional confidentiality beyond the block cipher itself and making patterns visible.
CBC (B), CTR (C), and OFB (D) are more secure and avoid patterns.
Reference Extract from Study Guide:
"Electronic Codebook (ECB) mode encrypts each block independently and is simple but reveals patterns when identical plaintext blocks occur, thus offering minimal confidentiality beyond the underlying cipher."
- WGU Cybersecurity Architecture and Engineering (KFO1 / D488), Block Cipher Modes of Operation

NEW QUESTION # 28
A company has recently implemented a hybrid cloud deployment. The security team has been notified about thousands of failed attempts to connect to routers and switches in the on-premises network. A solution must be implemented to block connections after three unsuccessful SSH attempts on any network device.

A. Data Loss Prevention
B. Intrusion Prevention System (IPS)
C. Firewall

Answer: B

Explanation:
AnIntrusion Prevention System (IPS)detects and blocks malicious activity in real time based on defined policies or behavior patterns. IPS tools can enforcerate limiting,connection attempts, and evenauto- blockingafter repeated failures.
NIST SP 800-94 Rev. 1:
"Intrusion prevention systems not only detect potential incidents but actively prevent attempts such as brute- force attacks on services like SSH." Firewalls may filter traffic, but only an IPSactively terminates or blocks behavior-based threats like repeated failed logins.
#WGU Course Alignment:
Domain:Network Security
Topic:Deploy and configure IPS for automated protection against brute-force attacks

NEW QUESTION # 29
Which algorithm is suitable for ensuring the integrity of digital documents and detecting any unauthorized modifications?

A. Rivest-Shamir-Adleman (RSA)
B. Secure Hash Algorithm 256 (SHA-256)
C. Advanced Encryption Standard (AES)
D. Data Encryption Standard (DES)

Answer: B

Explanation:
The correct answer is B - Secure Hash Algorithm 256 (SHA-256).
WGU Cybersecurity Architecture and Engineering (KFO1 / D488) outlines that SHA-256 is a cryptographic hash function used to verify data integrity. It generates a fixed-size hash value based on input data, and any alteration to the data results in a different hash, signaling tampering.
DES (A) and AES (C) are encryption algorithms for confidentiality. RSA (D) is used for encryption and digital signatures, not solely for ensuring integrity via hashing.
Reference Extract from Study Guide:
"SHA-256 is a widely adopted cryptographic hash function used to verify the integrity of digital data and detect unauthorized modifications."
- WGU Cybersecurity Architecture and Engineering (KFO1 / D488), Cryptographic Hash Functions and Data Integrity

NEW QUESTION # 30
In which type of network topology are the networked devices connected to a central device like a hub or switch?

A. Bus
B. Ring
C. Star
D. Mesh

Answer: C

Explanation:
* In a star network topology, each network device is connected to a central device like a hub or a switch.
* This central device acts as a repeater for data flow.
* The other options:
* Bus topology uses a single central cable.
* Mesh topology involves each device being connected to every other device.
* Ring topology connects devices in a circular fashion.
* Therefore, the star topology correctly describes a network where devices connect to a central hub or switch.
References:
* "Data and Computer Communications" by William Stallings, which explains different network topologies.
* "Network+ Guide to Networks" by Jill West, Tamara Dean, and Jean Andrews, which covers network configurations.

NEW QUESTION # 31
Why is business continuity planning essential?

A. It allows for succession planning.
B. It allows for the quickest return to business operations.
C. It ensures that the company will be profitable.
D. It ensures that the company will avoid asset loss.

Answer: B

Explanation:
Business continuity planning (BCP) is essential because it ensures that an organization can quickly resume its critical functions after a disruption. The key aspects include:
* Minimizing downtime: Strategies to restore business operations as quickly as possible.
* Risk management: Identifying potential threats and creating plans to mitigate their impact.
* Data recovery: Ensuring that data can be restored quickly in the event of a loss.
* Communication plans: Establishing protocols for communicating with employees, customers, and stakeholders during and after a disruption.
The primary goal of BCP is to ensure the quickest return to business operations, maintaining service levels and minimizing financial losses.
References
* Andrew Hiles, "The Definitive Handbook of Business Continuity Management," Wiley.
* Michael Wallace and Lawrence Webber, "The Disaster Recovery Handbook," AMACOM.

NEW QUESTION # 32
......

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