CISCO CERTIFIED NETWORK ASSOCIATE (CCNA) – QUESTIONS AND CORRECT ANSWERS (VERIFIED
ANSWERS) PLUS RATIONALES 2026 Q&A | INSTANT DOWNLOAD PDF.
CORE DOMAINS
Network Fundamentals
Network Access
IP Connectivity
IP Services
Security Fundamentals
Automation and Programmability
Ethical Engineering Practices
Regulatory Compliance and Data Privacy
INTRODUCTION
,The purpose of this exam is to rigorously assess a candidate's proficiency in core networking technologies and
infrastructure management. This examination evaluates essential skills in network configuration, troubleshooting,
security implementation, and automation workflows. Structured with a blend of multiple-choice and complex scenario-
based questions, the exam requires candidates to demonstrate mastery of both foundational theory and advanced
technical application. It places a significant emphasis on real-world problem solving, requiring sound decision-making
capabilities within enterprise environments. By testing knowledge across diverse networking domains, this assessment
ensures that practitioners are prepared to maintain, secure, and optimize modern, scalable, and compliant network
infrastructures effectively.
SECTION ONE: QUESTIONS 1–100
Question 1
Which layer of the OSI model is responsible for logical addressing and routing decisions?
A. Data Link
B. Network
C. Transport
D. Session
🟢B
🔴 RATIONALE: The Network layer (Layer 3) handles logical addressing, such as IP addresses, and determines the
best path for data packets to reach their destination.
Question 2
You are configuring a switch port to connect to a server that does not support trunking. Which command should be
used?
A. switchport mode trunk
B. switchport mode access
C. switchport nonegotiate
D. switchport trunk native vlan 1
🟢B
🔴 RATIONALE: The access mode is used for ports connected to end devices that are not participating in trunking
protocols.
,Question 3
Which of the following IPv6 addresses is a link-local address?
A. 2001:db8::1
B. ff02::1
C. fe80::1
D. ::1
🟢C
🔴 RATIONALE: Link-local addresses in IPv6 always begin with the prefix fe80::/10.
Question 4
What is the primary purpose of an ACL in a network environment?
A. To increase bandwidth
B. To provide encryption
C. To filter traffic based on defined criteria
D. To provide redundancy
🟢C
🔴 RATIONALE: Access Control Lists (ACLs) are used to permit or deny traffic based on IP addresses, protocols, or
ports to enhance security and traffic management.
Question 5
In an automated network environment, which protocol is commonly used for device configuration and management?
A. RESTCONF
B. ICMP
C. ARP
D. Telnet
🟢A
🔴 RATIONALE: RESTCONF is a standard protocol used for configuring network devices through RESTful APIs,
which is essential for network automation.
Question 6
Which component of the CIA triad relates to ensuring that information is accessed only by authorized users?
, A. Confidentiality
B. Integrity
C. Availability
D. Authenticity
🟢A
🔴 RATIONALE: Confidentiality ensures that sensitive data is protected from unauthorized access or disclosure.
Question 7
A router has a routing table entry with an administrative distance of 1. What routing protocol is likely being used?
A. OSPF
B. EIGRP
C. Static Route
D. Connected Interface
🟢C
🔴 RATIONALE: Static routes have a default administrative distance of 1, making them more trusted than most
dynamic routing protocols.
Question 8
Which command displays the current running configuration on a Cisco device?
A. show config
B. show running-config
C. show startup-config
D. copy run start
🟢B
🔴 RATIONALE: The show running-config command displays the configuration currently stored in the device's RAM.
Question 9
What is the function of the Spanning Tree Protocol (STP)?
A. To increase network speed
B. To prevent loops in a redundant Layer 2 network
C. To provide load balancing
ANSWERS) PLUS RATIONALES 2026 Q&A | INSTANT DOWNLOAD PDF.
CORE DOMAINS
Network Fundamentals
Network Access
IP Connectivity
IP Services
Security Fundamentals
Automation and Programmability
Ethical Engineering Practices
Regulatory Compliance and Data Privacy
INTRODUCTION
,The purpose of this exam is to rigorously assess a candidate's proficiency in core networking technologies and
infrastructure management. This examination evaluates essential skills in network configuration, troubleshooting,
security implementation, and automation workflows. Structured with a blend of multiple-choice and complex scenario-
based questions, the exam requires candidates to demonstrate mastery of both foundational theory and advanced
technical application. It places a significant emphasis on real-world problem solving, requiring sound decision-making
capabilities within enterprise environments. By testing knowledge across diverse networking domains, this assessment
ensures that practitioners are prepared to maintain, secure, and optimize modern, scalable, and compliant network
infrastructures effectively.
SECTION ONE: QUESTIONS 1–100
Question 1
Which layer of the OSI model is responsible for logical addressing and routing decisions?
A. Data Link
B. Network
C. Transport
D. Session
🟢B
🔴 RATIONALE: The Network layer (Layer 3) handles logical addressing, such as IP addresses, and determines the
best path for data packets to reach their destination.
Question 2
You are configuring a switch port to connect to a server that does not support trunking. Which command should be
used?
A. switchport mode trunk
B. switchport mode access
C. switchport nonegotiate
D. switchport trunk native vlan 1
🟢B
🔴 RATIONALE: The access mode is used for ports connected to end devices that are not participating in trunking
protocols.
,Question 3
Which of the following IPv6 addresses is a link-local address?
A. 2001:db8::1
B. ff02::1
C. fe80::1
D. ::1
🟢C
🔴 RATIONALE: Link-local addresses in IPv6 always begin with the prefix fe80::/10.
Question 4
What is the primary purpose of an ACL in a network environment?
A. To increase bandwidth
B. To provide encryption
C. To filter traffic based on defined criteria
D. To provide redundancy
🟢C
🔴 RATIONALE: Access Control Lists (ACLs) are used to permit or deny traffic based on IP addresses, protocols, or
ports to enhance security and traffic management.
Question 5
In an automated network environment, which protocol is commonly used for device configuration and management?
A. RESTCONF
B. ICMP
C. ARP
D. Telnet
🟢A
🔴 RATIONALE: RESTCONF is a standard protocol used for configuring network devices through RESTful APIs,
which is essential for network automation.
Question 6
Which component of the CIA triad relates to ensuring that information is accessed only by authorized users?
, A. Confidentiality
B. Integrity
C. Availability
D. Authenticity
🟢A
🔴 RATIONALE: Confidentiality ensures that sensitive data is protected from unauthorized access or disclosure.
Question 7
A router has a routing table entry with an administrative distance of 1. What routing protocol is likely being used?
A. OSPF
B. EIGRP
C. Static Route
D. Connected Interface
🟢C
🔴 RATIONALE: Static routes have a default administrative distance of 1, making them more trusted than most
dynamic routing protocols.
Question 8
Which command displays the current running configuration on a Cisco device?
A. show config
B. show running-config
C. show startup-config
D. copy run start
🟢B
🔴 RATIONALE: The show running-config command displays the configuration currently stored in the device's RAM.
Question 9
What is the function of the Spanning Tree Protocol (STP)?
A. To increase network speed
B. To prevent loops in a redundant Layer 2 network
C. To provide load balancing
