WGU D440 Network and Security Foundations Comprehensive… 2026 Update • Verified Answers
✓ VERIFIED • 2026 UPDATE • 100% ACCURATE
WGU D440 Network and Security Foundations
Comprehensive Exam 2026 UPDATE
Actual Exam Questions & Verified Answers
with Detailed Rationales
Document Type: Exam (Elaborations)
Academic Year:
Total Questions: 50 Multiple Choice
Includes: Correct Answers + Full Rationales
Status: Verified & Updated for 2026
Exam (Elaborations) • Actual Questions & Rationales Page 1
,WGU D440 Network and Security Foundations Comprehensive… 2026 Update • Verified Answers
Questions & Verified Answers
1. A security analyst is ensuring that data is not modified by unauthorized users during
transmission. Which component of the CIA triad is being addressed?
A. Availability
B. Confidentiality
C. Integrity
D. Authentication
Answer: C
Rationale: Integrity ensures that information and programs are changed only in a specified and authorized
manner, protecting against unauthorized modification or destruction of information. Exam questions often test
the ability to distinguish this concept from closely related distractors, making a clear rationale essential for
mastery.
2. Which layer of the OSI model is responsible for routing packets across different networks
using logical addresses?
A. Data Link Layer
B. Network Layer
C. Transport Layer
D. Session Layer
Answer: B
Rationale: The Network Layer (Layer 3) is responsible for logical addressing (IP addresses) and determining
the best path for data to travel across interconnected networks. Applying this knowledge in clinical settings
supports safe, evidence-based practice and improves patient outcomes.
3. An employee receives an email that appears to be from their bank, asking them to click a link
to verify their account details. What type of social engineering attack is this?
A. Tailgating
B. Shoulder Surfing
C. Phishing
D. Vishing
Answer: C
Rationale: Phishing is a method of trying to gather personal information using deceptive emails and websites.
Recognizing this principle allows the nurse to prioritize care, anticipate complications, and provide accurate
patient education. Exam questions often test the ability to distinguish this concept from closely related
distractors, making a clear rationale essential for mastery.
Exam (Elaborations) • Actual Questions & Rationales Page 2
, WGU D440 Network and Security Foundations Comprehensive… 2026 Update • Verified Answers
4. Which network device operates primarily at Layer 2 of the OSI model and uses MAC
addresses to forward data to specific ports?
A. Hub
B. Router
C. Repeater
D. Switch
Answer: D
Rationale: Switches operate at the Data Link Layer (Layer 2) and use MAC addresses to direct traffic to the
specific physical port where the destination device is connected. Exam questions often test the ability to
distinguish this concept from closely related distractors, making a clear rationale essential for mastery.
5. Which protocol is used to automatically assign IP addresses, subnet masks, and default
gateways to hosts on a network?
A. DNS
B. DHCP
C. HTTP
D. SNMP
Answer: B
Rationale: Dynamic Host Configuration Protocol (DHCP) is used to dynamically assign IP addresses and other
network configuration parameters to devices on a network. Recognizing this principle allows the nurse to
prioritize care, anticipate complications, and provide accurate patient education. Exam questions often test the
ability to distinguish this concept from closely related distractors, making a clear rationale essential for mastery.
6. A company wants to ensure that if one server fails, another server can immediately take over
its duties to maintain uptime. Which concept does this represent?
A. Confidentiality
B. Non-repudiation
C. Integrity
D. Availability
Answer: D
Rationale: Availability ensures timely and reliable access to and use of information and services, often
achieved through redundancy and failover systems. Exam questions often test the ability to distinguish this
concept from closely related distractors, making a clear rationale essential for mastery. Applying this knowledge
in clinical settings supports safe, evidence-based practice and improves patient outcomes.
Exam (Elaborations) • Actual Questions & Rationales Page 3
✓ VERIFIED • 2026 UPDATE • 100% ACCURATE
WGU D440 Network and Security Foundations
Comprehensive Exam 2026 UPDATE
Actual Exam Questions & Verified Answers
with Detailed Rationales
Document Type: Exam (Elaborations)
Academic Year:
Total Questions: 50 Multiple Choice
Includes: Correct Answers + Full Rationales
Status: Verified & Updated for 2026
Exam (Elaborations) • Actual Questions & Rationales Page 1
,WGU D440 Network and Security Foundations Comprehensive… 2026 Update • Verified Answers
Questions & Verified Answers
1. A security analyst is ensuring that data is not modified by unauthorized users during
transmission. Which component of the CIA triad is being addressed?
A. Availability
B. Confidentiality
C. Integrity
D. Authentication
Answer: C
Rationale: Integrity ensures that information and programs are changed only in a specified and authorized
manner, protecting against unauthorized modification or destruction of information. Exam questions often test
the ability to distinguish this concept from closely related distractors, making a clear rationale essential for
mastery.
2. Which layer of the OSI model is responsible for routing packets across different networks
using logical addresses?
A. Data Link Layer
B. Network Layer
C. Transport Layer
D. Session Layer
Answer: B
Rationale: The Network Layer (Layer 3) is responsible for logical addressing (IP addresses) and determining
the best path for data to travel across interconnected networks. Applying this knowledge in clinical settings
supports safe, evidence-based practice and improves patient outcomes.
3. An employee receives an email that appears to be from their bank, asking them to click a link
to verify their account details. What type of social engineering attack is this?
A. Tailgating
B. Shoulder Surfing
C. Phishing
D. Vishing
Answer: C
Rationale: Phishing is a method of trying to gather personal information using deceptive emails and websites.
Recognizing this principle allows the nurse to prioritize care, anticipate complications, and provide accurate
patient education. Exam questions often test the ability to distinguish this concept from closely related
distractors, making a clear rationale essential for mastery.
Exam (Elaborations) • Actual Questions & Rationales Page 2
, WGU D440 Network and Security Foundations Comprehensive… 2026 Update • Verified Answers
4. Which network device operates primarily at Layer 2 of the OSI model and uses MAC
addresses to forward data to specific ports?
A. Hub
B. Router
C. Repeater
D. Switch
Answer: D
Rationale: Switches operate at the Data Link Layer (Layer 2) and use MAC addresses to direct traffic to the
specific physical port where the destination device is connected. Exam questions often test the ability to
distinguish this concept from closely related distractors, making a clear rationale essential for mastery.
5. Which protocol is used to automatically assign IP addresses, subnet masks, and default
gateways to hosts on a network?
A. DNS
B. DHCP
C. HTTP
D. SNMP
Answer: B
Rationale: Dynamic Host Configuration Protocol (DHCP) is used to dynamically assign IP addresses and other
network configuration parameters to devices on a network. Recognizing this principle allows the nurse to
prioritize care, anticipate complications, and provide accurate patient education. Exam questions often test the
ability to distinguish this concept from closely related distractors, making a clear rationale essential for mastery.
6. A company wants to ensure that if one server fails, another server can immediately take over
its duties to maintain uptime. Which concept does this represent?
A. Confidentiality
B. Non-repudiation
C. Integrity
D. Availability
Answer: D
Rationale: Availability ensures timely and reliable access to and use of information and services, often
achieved through redundancy and failover systems. Exam questions often test the ability to distinguish this
concept from closely related distractors, making a clear rationale essential for mastery. Applying this knowledge
in clinical settings supports safe, evidence-based practice and improves patient outcomes.
Exam (Elaborations) • Actual Questions & Rationales Page 3
