CCNA Mock Interview Questions and Answers for Freshers-2026 | Top 50+ Questions! #ccna #networking

Summary

A comprehensive mock interview session for CCNA certification candidates, covering core networking concepts such as OSI model layers, protocols, and switch configurations.

Highlights

Introduction and Networking Fundamentals00:00:00

Shivkumar Reddy introduces himself, followed by a discussion on the difference between a network and networking. The interview covers basic concepts such as Ethernet types, Ethernet headers, preamble, and the unique structure of MAC addresses.

MAC, IP, and Communication Processes00:03:34

The interviewer explores the distinction between physical (MAC) and logical (IP) addresses, detailing the ARP request process, how broadcasts work, and how a router functions during communication between different subnets.

Layer 4 and DHCP Procedures00:08:22

Discussion moves to transport layer protocols (TCP/UDP), window size, fragmentation, and segmentation. The session also covers the DHCP DORA process, lease times, and how relay agents manage requests across subnets.

Routing Protocols and VLAN Configuration00:16:03

The candidate explains OSPF fundamentals, including neighbor states, multicast addresses (224.0.0.5 and 224.0.0.6), and DR/BDR elections. The conversation then shifts to VLANs, tagging (dot1Q/ISL), and switch port management.

STP and Final Feedback00:25:20

The interview concludes with a focus on Spanning Tree Protocol (STP), portfast, BPDU guard, and EtherChannel configuration. The interviewer provides feedback on areas requiring further revision to gain more confidence.