Most asked CCNA interview questions and answers for fresher 2026 (part-1) | searchingbug.com

Last Updated Jul 25, 2026

Q-1: What is CCNA?

Ans: CCNA stands for Cisco Certified Network Associate; it is an entry-level networking certificate given by CISCO that covers networking fundamentals, IP connectivity, troubleshooting, and security.

Q-2: What is a computer network?

Ans: A group of devices that are connected to each other. Their purpose is simple: connecting and sharing resources.

Q-3: What is OSI model?

Ans: OSI stands for Open System Interconnection.

It is a 7-layer networking model.

1 - Physical layer

2 - Data link layer

3 - Network layer

4 - Transport layer

5 - Session layer

6 - Presentation layer

7 - Application layer

Q-4: What is TCP/IP model?

Ans: TCP stands for Transmission Control Protocol.

IP stands for Internet Protocol.

TCP/IP model is a four-layer architecture that includes the following:

• Application

• Transport

• Internet

• Network access

Q-5: What is the difference between TCP and UDP?

Ans: TCP uses a three-way handshake, which meaning it establishes a connection before sending any data, so there is no data loss, and it's highly secure and reliable as well.

DRAWBACK: It is slower than UDP.

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