WGU D317 NETWORKING FOUNDATIONS
EXAM
2026/2027
Complete Exam-Style Questions | Detailed
Rationales | Pass Guaranteed | A+ Graded
70 Verified Questions | 5 Networking Domains | Industry Standards Aligned
Based on 2026/2027 WGU D317 Networking Foundations Curriculum
CompTIA Network+ and Cisco CCNA Foundational Standards
,Key Features
✓ OSI and TCP/IP models and their respective protocols
✓ Network topologies, cabling standards, and wireless technologies
✓ IP addressing, subnetting, and routing fundamentals
✓ Network security principles, firewalls, and encryption basics
✓ Network troubleshooting methodologies and diagnostic tools
Updates for 2026
1. Updated WGU D317 curriculum integrating Wi-Fi 6E and Wi-Fi 7 wireless standards, including 6
GHz band utilization and enhanced OFDMA and MU-MIMO capabilities for next-generation wireless
deployments
2. Revised IPv6 deployment and transition mechanisms in modern enterprise networks, emphasizing
dual-stack implementation, DNS64/NAT64 gateways, and tunneling strategies for IPv4-to-IPv6
migration
3. New foundational concepts for securing IoT devices and zero-trust network access (ZTNA) basics,
incorporating micro-segmentation, continuous verification, and identity-based access control for
modern network architectures
Abstract
This comprehensive assessment document addresses the foundational networking domains required for
the WGU D317 Networking Foundations Objective Assessment. It encompasses the complete scope of
networking fundamentals, including network models and architectures (OSI and TCP/IP), physical layer
components and cabling standards, network access technologies and wireless communications, IP
addressing and routing principles, and network services and security fundamentals. Each of the 70
verified questions is aligned with current CompTIA Network+ and Cisco CCNA foundational standards
and reflects the theoretical and practical knowledge of network communication, infrastructure
components, IP services, and basic security required to ensure successful IT operations. The document
emphasizes the understanding of how data flows through network layers, the configuration and
management of network devices, and the troubleshooting methodologies essential for maintaining
reliable and secure network infrastructure.
Keywords
WGU D317, Networking Foundations, OSI Model, TCP/IP, Subnetting, Routing, Network Security,
Wireless Technologies, CompTIA Network+, Cisco CCNA
Content Area Overview
Content Area Questions Key Topics Weight
Network Models & Architectures 1-11 OSI/TCP-IP Models, Encapsulation, 15%
(15%) Topologies, Protocols, Layer
Functions, Device Roles
Physical Layer & Cabling (15%) 12-21 Fiber/Copper Media, Cat Standards, 15%
Connectors, PoE, Transceivers, Serial
Cables, EMI
Network Access & Wireless 22-35 Switching, VLANs, STP, Wi-Fi 20%
(20%) Standards, Security (WPA3), CSMA-
CD, Trunking, QoS, RADIUS
IP Addressing & Routing (25%) 36-53 Subnetting, CIDR, IPv6, NAT, DHCP, 25%
DNS, ARP, Routing Protocols
(OSPF/RIP), Admin Distance
Network Services & Security 54-70 Firewalls, DMZ, TLS/SSL, ACLs, 25%
(25%) DDoS, Zero Trust, VPN,
WGU D317 Networking Foundations Exam 2026/2027 | Page 1
, Content Area Questions Key Topics Weight
Authentication, Troubleshooting, Port
Security
Examination Questions
Domain: Network Models & Architectures
1. At which layer of the OSI model do routers operate?
A. Layer 1 (Physical)
B. Layer 2 (Data Link)
C. Layer 3 (Network)
D. Layer 4 (Transport)
Correct Answer: C
Rationale: Routers operate at Layer 3 (Network Layer) of the OSI model. The Network Layer is
responsible for logical addressing (IP addresses) and path determination, which are the primary
functions of a router. Routers make forwarding decisions based on destination IP addresses stored
in their routing tables and determine the best path for packets to travel across interconnected
networks.
Why Wrong: A is incorrect because Layer 1 deals with physical bit transmission over media. B is
incorrect because Layer 2 devices (switches, bridges) use MAC addresses for forwarding. D is
incorrect because Layer 4 manages end-to-end communication and flow control (TCP/UDP).
Reference: WGU D317 Course Module 1: Network Models; Lammle, CompTIA Network+ Study
Guide, Ch. 2
2. Which protocol operates at the Transport Layer of the TCP/IP model?
A. HTTP
B. TCP
C. IP
D. Ethernet
Correct Answer: B
Rationale: TCP (Transmission Control Protocol) operates at the Transport Layer (Layer 4) of both
the OSI and TCP/IP models. TCP provides reliable, connection-oriented communication with
features including three-way handshake establishment, flow control via sliding windows, error
detection and correction through acknowledgments and retransmission, and ordered delivery of
segments.
Why Wrong: A is incorrect because HTTP operates at the Application Layer (Layer 7). C is
incorrect because IP operates at the Network/Internet Layer (Layer 3). D is incorrect because
Ethernet operates at the Data Link Layer (Layer 2).
Reference: WGU D317 Course Module 1: Network Models; Kurose & Ross, Computer Networking,
Ch. 3
3. What is the primary difference between the OSI model and the TCP/IP model?
A. The OSI model has four layers while TCP/IP has seven
B. The OSI model is a theoretical reference model while TCP/IP is a practical implementation
C. The TCP/IP model includes the Session layer which OSI does not
D. Both models are identical in structure and function
Correct Answer: B
Rationale: The OSI model is a theoretical, conceptual framework with seven layers developed by
the International Organization for Standardization to standardize network communication and
serve as a reference for understanding and designing network architectures. The TCP/IP model is a
practical, four-layer implementation model that was developed alongside the actual protocols
(TCP/IP suite) that drive the internet. The TCP/IP model consolidates the upper three OSI layers
into a single Application layer and the lower two into a single Network Access layer.
WGU D317 Networking Foundations Exam 2026/2027 | Page 2
EXAM
2026/2027
Complete Exam-Style Questions | Detailed
Rationales | Pass Guaranteed | A+ Graded
70 Verified Questions | 5 Networking Domains | Industry Standards Aligned
Based on 2026/2027 WGU D317 Networking Foundations Curriculum
CompTIA Network+ and Cisco CCNA Foundational Standards
,Key Features
✓ OSI and TCP/IP models and their respective protocols
✓ Network topologies, cabling standards, and wireless technologies
✓ IP addressing, subnetting, and routing fundamentals
✓ Network security principles, firewalls, and encryption basics
✓ Network troubleshooting methodologies and diagnostic tools
Updates for 2026
1. Updated WGU D317 curriculum integrating Wi-Fi 6E and Wi-Fi 7 wireless standards, including 6
GHz band utilization and enhanced OFDMA and MU-MIMO capabilities for next-generation wireless
deployments
2. Revised IPv6 deployment and transition mechanisms in modern enterprise networks, emphasizing
dual-stack implementation, DNS64/NAT64 gateways, and tunneling strategies for IPv4-to-IPv6
migration
3. New foundational concepts for securing IoT devices and zero-trust network access (ZTNA) basics,
incorporating micro-segmentation, continuous verification, and identity-based access control for
modern network architectures
Abstract
This comprehensive assessment document addresses the foundational networking domains required for
the WGU D317 Networking Foundations Objective Assessment. It encompasses the complete scope of
networking fundamentals, including network models and architectures (OSI and TCP/IP), physical layer
components and cabling standards, network access technologies and wireless communications, IP
addressing and routing principles, and network services and security fundamentals. Each of the 70
verified questions is aligned with current CompTIA Network+ and Cisco CCNA foundational standards
and reflects the theoretical and practical knowledge of network communication, infrastructure
components, IP services, and basic security required to ensure successful IT operations. The document
emphasizes the understanding of how data flows through network layers, the configuration and
management of network devices, and the troubleshooting methodologies essential for maintaining
reliable and secure network infrastructure.
Keywords
WGU D317, Networking Foundations, OSI Model, TCP/IP, Subnetting, Routing, Network Security,
Wireless Technologies, CompTIA Network+, Cisco CCNA
Content Area Overview
Content Area Questions Key Topics Weight
Network Models & Architectures 1-11 OSI/TCP-IP Models, Encapsulation, 15%
(15%) Topologies, Protocols, Layer
Functions, Device Roles
Physical Layer & Cabling (15%) 12-21 Fiber/Copper Media, Cat Standards, 15%
Connectors, PoE, Transceivers, Serial
Cables, EMI
Network Access & Wireless 22-35 Switching, VLANs, STP, Wi-Fi 20%
(20%) Standards, Security (WPA3), CSMA-
CD, Trunking, QoS, RADIUS
IP Addressing & Routing (25%) 36-53 Subnetting, CIDR, IPv6, NAT, DHCP, 25%
DNS, ARP, Routing Protocols
(OSPF/RIP), Admin Distance
Network Services & Security 54-70 Firewalls, DMZ, TLS/SSL, ACLs, 25%
(25%) DDoS, Zero Trust, VPN,
WGU D317 Networking Foundations Exam 2026/2027 | Page 1
, Content Area Questions Key Topics Weight
Authentication, Troubleshooting, Port
Security
Examination Questions
Domain: Network Models & Architectures
1. At which layer of the OSI model do routers operate?
A. Layer 1 (Physical)
B. Layer 2 (Data Link)
C. Layer 3 (Network)
D. Layer 4 (Transport)
Correct Answer: C
Rationale: Routers operate at Layer 3 (Network Layer) of the OSI model. The Network Layer is
responsible for logical addressing (IP addresses) and path determination, which are the primary
functions of a router. Routers make forwarding decisions based on destination IP addresses stored
in their routing tables and determine the best path for packets to travel across interconnected
networks.
Why Wrong: A is incorrect because Layer 1 deals with physical bit transmission over media. B is
incorrect because Layer 2 devices (switches, bridges) use MAC addresses for forwarding. D is
incorrect because Layer 4 manages end-to-end communication and flow control (TCP/UDP).
Reference: WGU D317 Course Module 1: Network Models; Lammle, CompTIA Network+ Study
Guide, Ch. 2
2. Which protocol operates at the Transport Layer of the TCP/IP model?
A. HTTP
B. TCP
C. IP
D. Ethernet
Correct Answer: B
Rationale: TCP (Transmission Control Protocol) operates at the Transport Layer (Layer 4) of both
the OSI and TCP/IP models. TCP provides reliable, connection-oriented communication with
features including three-way handshake establishment, flow control via sliding windows, error
detection and correction through acknowledgments and retransmission, and ordered delivery of
segments.
Why Wrong: A is incorrect because HTTP operates at the Application Layer (Layer 7). C is
incorrect because IP operates at the Network/Internet Layer (Layer 3). D is incorrect because
Ethernet operates at the Data Link Layer (Layer 2).
Reference: WGU D317 Course Module 1: Network Models; Kurose & Ross, Computer Networking,
Ch. 3
3. What is the primary difference between the OSI model and the TCP/IP model?
A. The OSI model has four layers while TCP/IP has seven
B. The OSI model is a theoretical reference model while TCP/IP is a practical implementation
C. The TCP/IP model includes the Session layer which OSI does not
D. Both models are identical in structure and function
Correct Answer: B
Rationale: The OSI model is a theoretical, conceptual framework with seven layers developed by
the International Organization for Standardization to standardize network communication and
serve as a reference for understanding and designing network architectures. The TCP/IP model is a
practical, four-layer implementation model that was developed alongside the actual protocols
(TCP/IP suite) that drive the internet. The TCP/IP model consolidates the upper three OSI layers
into a single Application layer and the lower two into a single Network Access layer.
WGU D317 Networking Foundations Exam 2026/2027 | Page 2
