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Free Cybersecurity-Architecture-and-Engineering Exam Braindumps
WGU Cybersecurity Architecture and Engineering (KFO1/D488) Questions 106–110 (page: 23)

Updated On: 11-Feb-2026
Page 23 of 48
PDF with 232 Questions

An organization wants to implement a new encryption solution for a real-time video conferencing application. The organization wants to ensure that the encryption solution provides protection for the video stream without causing significant delays or latency in the conference.

Which type of encryption will meet the needs of the organization?

  1. Block ciphers
  2. Asymmetric encryption
  3. Stream ciphers
  4. Hash functions

Answer(s): C

Explanation:

The correct answer is C -- Stream ciphers.

WGU Cybersecurity Architecture and Engineering (KFO1 / D488) content explains that stream ciphers encrypt data bit-by-bit or byte-by-byte, making them highly efficient and suitable for real-time applications like video conferencing where low latency is critical.

Block ciphers (A) encrypt large chunks of data, causing latency. Asymmetric encryption (B) is too slow for real-time data streams. Hash functions (D) are used for data integrity, not for ongoing data encryption.


Reference:

Extract from Study Guide:

"Stream ciphers encrypt data continuously and are ideal for real-time applications such as video or audio streaming where low latency is essential."

-- WGU Cybersecurity Architecture and Engineering (KFO1 / D488), Encryption Technologies



An organization wants to securely transmit sensitive information between two parties. The organization wants to use a cryptographic technique that allows both parties to encrypt and decrypt messages using the same key. The organization is also concerned about the performance impact of the encryption technique.

Which type of cryptographic algorithm meets the needs of the organization?

  1. Block cipher
  2. Hash function
  3. Symmetric algorithm
  4. Asymmetric algorithm

Answer(s): C

Explanation:

The correct answer is C -- Symmetric algorithm.

According to the WGU Cybersecurity Architecture and Engineering (KFO1 / D488) study material, symmetric encryption uses the same key for both encryption and decryption, offering high speed and lower computational overhead compared to asymmetric algorithms. This makes symmetric encryption ideal when both security and performance are important factors.

Block cipher (A) is a type of symmetric algorithm but not the broader category being asked. Hash functions (B) are for data integrity, not encryption/decryption. Asymmetric algorithms (D) are more secure for key exchange but have higher computational cost.


Reference:

Extract from Study Guide:

"Symmetric encryption algorithms use a single shared key for encryption and decryption, offering efficient and high-performance protection for sensitive data transmissions."

-- WGU Cybersecurity Architecture and Engineering (KFO1 / D488), Cryptography Fundamentals



An organization wants to secure remote access to its servers and is looking for a secure protocol that can provide encryption and strong authentication. The organization wants to ensure that its servers can only be accessed by authorized users and that the data exchanged during the session is encrypted.

Which protocol meets the needs of the organization?

  1. Hypertext Transfer Protocol (HTTP)
  2. File Transfer Protocol (FTP)
  3. Telnet
  4. Secure Shell (SSH)

Answer(s): D

Explanation:

The correct answer is D -- Secure Shell (SSH).

WGU Cybersecurity Architecture and Engineering (KFO1 / D488) materials state that SSH provides strong encryption and authentication for remote access over unsecured networks. SSH ensures that sessions are confidential and that only authorized users can access remote systems.

HTTP (A) and FTP (B) transmit data in plaintext and do not provide encryption. Telnet (C) also transmits data in plaintext and is insecure for remote access.


Reference:

Extract from Study Guide:

"Secure Shell (SSH) is used for secure remote management, offering encrypted communications and authentication mechanisms to protect against unauthorized access and eavesdropping."

-- WGU Cybersecurity Architecture and Engineering (KFO1 / D488), Secure Protocols and Communications



Which protocol can be used to provide secure email communication and ensure the confidentiality, integrity, and authenticity of email messages?

  1. Simple Mail Transfer Protocol (SMTP)
  2. Pretty Good Privacy (PGP)
  3. Secure/Multipurpose Internet Mail Extensions (S/MIME)
  4. Internet Protocol Security (IPsec)

Answer(s): C

Explanation:

The correct answer is C -- Secure/Multipurpose Internet Mail Extensions (S/MIME).

As outlined in WGU Cybersecurity Architecture and Engineering (KFO1 / D488), S/MIME provides encryption, integrity, and authentication for email messages by using public key cryptography and digital signatures.

SMTP (A) is used for sending emails but does not secure them. PGP (B) also secures emails but is not a protocol; it is a program and standard. IPsec (D) secures network communications, not email specifically.


Reference:

Extract from Study Guide:

"Secure/Multipurpose Internet Mail Extensions (S/MIME) is a protocol used to encrypt and digitally sign email communications, ensuring confidentiality, integrity, and authenticity."

-- WGU Cybersecurity Architecture and Engineering (KFO1 / D488), Secure Communication Technologies



Which key exchange algorithm is based on advanced cryptography algorithms and is a more efficient alternative to traditional key exchange algorithms?

  1. Diffie-Hellman (DH)
  2. Elliptic Curve Diffie-Hellman (ECDH)
  3. Rivest-Shamir-Adleman (RSA)
  4. Digital Signature Algorithm (DSA)

Answer(s): B

Explanation:

The correct answer is B -- Elliptic Curve Diffie-Hellman (ECDH).

WGU Cybersecurity Architecture and Engineering (KFO1 / D488) material highlights that ECDH is an enhanced, more efficient form of the traditional Diffie-Hellman key exchange, using elliptic curve cryptography (ECC). It provides similar security with much smaller key sizes, improving performance and efficiency.

DH (A) is the traditional method but is less efficient. RSA (C) is primarily used for encryption and digital signatures. DSA (D) is used for digital signatures, not for key exchange.


Reference:

Extract from Study Guide:

"Elliptic Curve Diffie-Hellman (ECDH) enhances traditional key exchange by utilizing elliptic curve cryptography, offering higher security with smaller key sizes and improved efficiency."

-- WGU Cybersecurity Architecture and Engineering (KFO1 / D488), Cryptographic Key Management



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