NETWORK ADMINISTRATOR CERTIFICATION – QUESTIONS AND CORRECT ANSWERS (VERIFIED
ANSWERS) PLUS RATIONALES 2026 Q&A | INSTANT DOWNLOAD PDF.
CORE DOMAINS
Network Architecture and Infrastructure
Routing and Switching Protocols
Network Security and Compliance
Wireless Technologies
Network Troubleshooting and Optimization
Cloud and Virtualization Networking
Network Management and Monitoring
Ethics, Professionalism, and Legal Standards
INTRODUCTION
The purpose of this examination is to rigorously assess the candidate's proficiency in managing
enterprise-grade network environments. The test covers fundamental theoretical concepts, advanced
,technical configurations, and the application of industry best practices regarding security and regulatory
compliance. Featuring a combination of multiple-choice and complex scenario-based questions, the
assessment evaluates the candidate's ability to analyze technical issues, implement secure solutions, and
exercise sound judgment in professional situations. The focus remains on real-world application, critical
thinking, and decision-making skills necessary for a network administrator to maintain highly available,
secure, and efficient infrastructure in modern, evolving organizational landscapes.
SECTION ONE: QUESTIONS 1–100
1. Which OSI layer is responsible for logical addressing and routing decisions?
A. Data Link Layer
B. Network Layer
C. Transport Layer
D. Session Layer
🟢B
🔴 RATIONALE: The Network Layer (Layer 3) handles logical addressing (IP addresses) and
determines the best path for data packets to reach their destination.
2. A technician needs to prevent switching loops in a network with redundant links. Which protocol
should be enabled?
A. OSPF
B. EIGRP
C. STP
D. BGP
🟢C
🔴 RATIONALE: Spanning Tree Protocol (STP) is designed to prevent bridge loops and the
broadcast radiation that results from them in Ethernet networks.
3. Which of the following is considered an ethical violation for a Network Administrator?
A. Monitoring traffic for security threats
, B. Accessing private user files without authorization
C. Updating firmware during maintenance windows
D. Denying a request that violates security policy
🟢B
🔴 RATIONALE: Accessing private user files without explicit authorization or a legitimate business
need violates privacy policies and professional ethical standards.
4. What is the default administrative distance of OSPF?
A. 90
B. 100
C. 110
D. 120
🟢C
🔴 RATIONALE: OSPF has a default administrative distance of 110, which represents the
trustworthiness of the route source.
5. Which command is used to display the current routing table on a Cisco IOS device?
A. show ip interface brief
B. show running-config
C. show ip route
D. show version
🟢C
🔴 RATIONALE: The show ip route command is the standard command used to view the routing
table and verify reachability to networks.
6. Which wireless standard provides the highest theoretical throughput using both 2.4 GHz and 5 GHz
bands?
A. 802.11n
, B. 802.11ac
C. 802.11ax
D. 802.11g
🟢C
🔴 RATIONALE: 802.11ax (Wi-Fi 6) is designed for higher efficiency and throughput compared to
previous standards using both frequency bands.
7. What is the primary purpose of a VLAN?
A. To increase physical cable distance
B. To segment a broadcast domain
C. To replace the need for routers
D. To increase the speed of a single switch port
🟢B
🔴 RATIONALE: Virtual Local Area Networks (VLANs) logically segment a network into separate
broadcast domains, improving security and performance.
8. A company must comply with HIPAA regulations regarding data storage. Which action is most
appropriate?
A. Keeping data in plain text
B. Ensuring encryption of sensitive data at rest and in transit
C. Allowing all users access to all servers
D. Storing backups on public cloud storage without access controls
🟢B
🔴 RATIONALE: HIPAA requires the protection of electronic protected health information (ePHI),
which necessitates encryption and strict access controls.
9. Which protocol operates at the Transport Layer and provides reliable, connection-oriented data
transmission?
ANSWERS) PLUS RATIONALES 2026 Q&A | INSTANT DOWNLOAD PDF.
CORE DOMAINS
Network Architecture and Infrastructure
Routing and Switching Protocols
Network Security and Compliance
Wireless Technologies
Network Troubleshooting and Optimization
Cloud and Virtualization Networking
Network Management and Monitoring
Ethics, Professionalism, and Legal Standards
INTRODUCTION
The purpose of this examination is to rigorously assess the candidate's proficiency in managing
enterprise-grade network environments. The test covers fundamental theoretical concepts, advanced
,technical configurations, and the application of industry best practices regarding security and regulatory
compliance. Featuring a combination of multiple-choice and complex scenario-based questions, the
assessment evaluates the candidate's ability to analyze technical issues, implement secure solutions, and
exercise sound judgment in professional situations. The focus remains on real-world application, critical
thinking, and decision-making skills necessary for a network administrator to maintain highly available,
secure, and efficient infrastructure in modern, evolving organizational landscapes.
SECTION ONE: QUESTIONS 1–100
1. Which OSI layer is responsible for logical addressing and routing decisions?
A. Data Link Layer
B. Network Layer
C. Transport Layer
D. Session Layer
🟢B
🔴 RATIONALE: The Network Layer (Layer 3) handles logical addressing (IP addresses) and
determines the best path for data packets to reach their destination.
2. A technician needs to prevent switching loops in a network with redundant links. Which protocol
should be enabled?
A. OSPF
B. EIGRP
C. STP
D. BGP
🟢C
🔴 RATIONALE: Spanning Tree Protocol (STP) is designed to prevent bridge loops and the
broadcast radiation that results from them in Ethernet networks.
3. Which of the following is considered an ethical violation for a Network Administrator?
A. Monitoring traffic for security threats
, B. Accessing private user files without authorization
C. Updating firmware during maintenance windows
D. Denying a request that violates security policy
🟢B
🔴 RATIONALE: Accessing private user files without explicit authorization or a legitimate business
need violates privacy policies and professional ethical standards.
4. What is the default administrative distance of OSPF?
A. 90
B. 100
C. 110
D. 120
🟢C
🔴 RATIONALE: OSPF has a default administrative distance of 110, which represents the
trustworthiness of the route source.
5. Which command is used to display the current routing table on a Cisco IOS device?
A. show ip interface brief
B. show running-config
C. show ip route
D. show version
🟢C
🔴 RATIONALE: The show ip route command is the standard command used to view the routing
table and verify reachability to networks.
6. Which wireless standard provides the highest theoretical throughput using both 2.4 GHz and 5 GHz
bands?
A. 802.11n
, B. 802.11ac
C. 802.11ax
D. 802.11g
🟢C
🔴 RATIONALE: 802.11ax (Wi-Fi 6) is designed for higher efficiency and throughput compared to
previous standards using both frequency bands.
7. What is the primary purpose of a VLAN?
A. To increase physical cable distance
B. To segment a broadcast domain
C. To replace the need for routers
D. To increase the speed of a single switch port
🟢B
🔴 RATIONALE: Virtual Local Area Networks (VLANs) logically segment a network into separate
broadcast domains, improving security and performance.
8. A company must comply with HIPAA regulations regarding data storage. Which action is most
appropriate?
A. Keeping data in plain text
B. Ensuring encryption of sensitive data at rest and in transit
C. Allowing all users access to all servers
D. Storing backups on public cloud storage without access controls
🟢B
🔴 RATIONALE: HIPAA requires the protection of electronic protected health information (ePHI),
which necessitates encryption and strict access controls.
9. Which protocol operates at the Transport Layer and provides reliable, connection-oriented data
transmission?
