Introduction:
Are you preparing for a career in networking or aiming to become a Cisco Certified Network Associate (CCNA)? You have made a great choice! CCNA is one of the most respected IT certifications worldwide. It validates your ability to install, configure, operate, and troubleshoot medium-size routed and switched networks, skills that are in high demand in today’s IT job market.

In this guide, Jetking brings you the Top 60 CCNA Interview Questions and Answers for 2026 to help you ace your next interview confidently.

What is CCNA Certification?

CCNA (Cisco Certified Network Associate) is an entry-level certification offered by Cisco Systems, designed for networking professionals and students who want to build or enhance their careers in networking, IT infrastructure, or cloud computing.

A CCNA-certified professional understands network fundamentals, IP connectivity, IP services, security fundamentals, automation, and programmability, all essential skills for modern IT roles.

At Jetking, our CCNA course prepares you with hands-on training, real-world simulations, and interview readiness, so you’re not just certified, but job-ready too.

Why Choose CCNA Certification?

• Globally recognized certification

• High demand in IT and Networking industries

• Great career opportunities as Network Engineer, Support Engineer, System Administrator, or IT Technician

• A foundation for advanced Cisco certifications like CCNP and CCIE

• Boosts salary potential and career growth opportunity

Top 60 CCNA Interview Questions and Answers [2026 Updated]

Basic CCNA Interview Questions

1. What is a Network?

A network is a collection of interconnected devices that share data and resources.

2. What is the difference between a Hub, Switch, and Router?

• Hub: Broadcasts data to all devices.

• Switch: Sends data to a specific device (MAC address-based).

• Router: Connects multiple networks and directs data packets.

3. What are the different types of networks?

LAN, MAN, WAN, WLAN, and PAN.

4. What is an IP Address?

An IP address uniquely identifies a device on a network.

5. What are private IP addresses?

Private IP ranges are:

• 10.0.0.0 – 10.255.255.255

• 172.16.0.0 – 172.31.255.255

• 192.168.0.0 – 192.168.255.255

Intermediate CCNA Interview Questions

6. Explain Subnetting.

Subnetting divides a large network into smaller sub-networks to improve performance and security.

7. What is a VLAN?

A Virtual LAN (VLAN) is a logical group of devices on a different physical LAN to improve security and performance.

8. What is a default gateway?

The device (usually a router) connects a local network to the internet or another network.

9. What is the difference between TCP and UDP?

• TCP: Connection-oriented, reliable.

• UDP: Connectionless, faster but less reliable.

10. What is ARP?

Address Resolution Protocol (ARP) maps IP addresses to MAC addresses.

11. What is DNS and why is it used?

DNS (Domain Name System) converts domain names into IP addresses.

12. What is NAT?

Network Address Translation allows multiple devices on a private network to share a single public IP address.

13. What is an ACL?

An Access Control List (ACL) is used to filter network traffic and improve security.

14. What is Spanning Tree Protocol (STP)?

STP prevents network loops in a LAN.

15. What are routing protocols?

Protocols that determine the best path for data, like RIP, OSPF, and EIGRP.

Advanced CCNA Interview Questions

16. Difference between static and dynamic routing?

• Static: Manually configured routes.

• Dynamic: Automatically updated using routing protocols.

17. What is the function of OSPF?

OSPF (Open Shortest Path First) is a link-state routing protocol that uses Dijkstra’s algorithm to determine the best route.

18. What is EIGRP?

Enhanced Interior Gateway Routing Protocol is Cisco’s proprietary protocol for dynamic routing.

19. Explain the difference between IPv4 and IPv6.

IPv4 uses 32-bit addressing; IPv6 uses 128-bit addressing. IPv6 provides a larger address space and improved security.

20. What is DHCP?

Dynamic Host Configuration Protocol assigns IP addresses automatically to devices on a network.

21. What is the purpose of the ping command?

Ping checks the connectivity between two network devices.

22. What is a MAC address?

It’s a unique identifier assigned to a network interface card (NIC).

23. What is the function of Cisco IOS?

Cisco’s Internetwork Operating System (IOS) manages router and switch operations.

24. What are the layers of the OSI Model?

Physical, Data Link, Network, Transport, Session, Presentation, and Application.

25. What is encapsulation?

Encapsulation wraps data with protocol information at each OSI layer.

Scenario-Based CCNA Interview Questions

26. What will happen if two devices have the same IP address?

It causes an IP conflict, leading to connectivity issues.

27. How do you secure a Cisco router?

By setting strong passwords, enabling SSH, disabling unused ports, and applying ACLs.

28. How do you back up a Cisco configuration?

Using the command: copy running-config tftp

29. What is HSRP?

Hot Standby Router Protocol provides router redundancy for high availability.

30. How do you troubleshoot a network issue?

By checking physical connections, pinging devices, verifying IP configurations, and checking logs.

More Interview Topics to Revise

• DHCP Snooping

• VLAN Trunking Protocol (VTP)

• Port Security

• IP Routing Table

• Syslog and SNMP

• WAN Technologies

• Frame Relay and MPLS basics

• Cloud networking fundamentals

How Jetking Helps You Crack CCNA Interviews

At Jetking, our CCNA Certification Program covers all key networking concepts with real-time labs, simulation tools (like Cisco Packet Tracer), and mock interviews. We focus on both theoretical and practical learning, ensuring you are ready for job roles like:

• Network Support Engineer

• Technical Associate

• Network Administrator

• IT Infrastructure Specialist

With our strong placement network of 12,000+ recruitment partners, Jetking ensures that students not only clear interviews but also start strong IT careers.

Final Thoughts

The CCNA certification is your gateway to a rewarding career in networking and IT infrastructure. Prepare smartly using these 60 CCNA interview questions and answers, and get trained by industry experts at Jetking to stand out in your interviews.

Whether you are in Mumbai, Bangalore, Delhi, Pune, or any Jetking center across India, you can enroll in our CCNA Job-Ready Program and start your journey toward a global IT career.​