Relevant Networking Basic & CCNA Interview Questions and Answers for Freshers

Relevant Networking Basic & CCNA Interview Questions and Answers for Freshers

Are you a fresher preparing for an interview in the field of networking or looking to enhance your knowledge of
networking basics and CCNA? In this blog post, we present a comprehensive list of interview questions and answers
that will help you build a strong foundation in networking concepts and prepare for your job interview with

1. What is a computer network?

A computer network is a collection of interconnected devices, such as computers, servers, routers, switches, etc.,
that are connected to each other to facilitate communication and share resources.

2. What is the difference between a router and a switch?

A router is a networking device that connects multiple networks together and forwards data packets between them. It
operates at the network layer (Layer 3) of the OSI model. On the other hand, a switch is a networking device that
connects multiple devices within a network and forwards data packets between them. It operates at the data link
layer (Layer 2) of the OSI model.

3. What is the purpose of IP addressing?

IP addressing is used to uniquely identify devices in a network. It allows data packets to be correctly routed
between source and destination devices.

4. What is a subnet mask?

A subnet mask is a 32-bit number used to divide an IP address into network and host portions. It helps determine
which part of the IP address is the network address and which part is the host address.

5. What is VLAN?

A VLAN (Virtual Local Area Network) is a logical grouping of devices within a LAN. It allows the network
administrator to create separate broadcast domains and segregate traffic based on logical requirements rather
than physical constraints.

6. What is the purpose of DHCP?

DHCP (Dynamic Host Configuration Protocol) is a network protocol that automatically assigns IP addresses and other
network configuration settings to devices on a network. It eliminates the need for manual configuration of IP

7. Explain the OSI model.

The OSI (Open Systems Interconnection) model is a conceptual framework that standardizes the functions of a
communication system into seven different layers. These layers include the physical layer, data link layer,
network layer, transport layer, session layer, presentation layer, and application layer.

8. What is TCP/IP?

TCP/IP (Transmission Control Protocol/Internet Protocol) is a set of networking protocols used for communication
between devices on the internet. It provides end-to-end connectivity, ensuring that data packets are delivered
reliably from source to destination.

9. What is the purpose of a firewall?

A firewall is a network security device that monitors incoming and outgoing network traffic and decides whether to
allow or block specific traffic based on predefined security rules. It acts as a barrier between internal and
external networks, protecting the internal network from unauthorized access.

10. What is a subnet?

A subnet is a logical subdivision of an IP network. It allows an organization to divide a single IP network into
multiple smaller networks and helps in efficient management and utilization of IP addresses.

These are just a few sample questions and answers to help you get started with your networking basics and CCNA
interview preparation. Make sure to research and study more to gain a comprehensive understanding of networking
concepts. Best of luck with your interview!

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