CCNA Interview Questions and Answers

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Last update: 08 Nov 2020, 10 Questions

The abbreviation of the CCNA is Cisco Certified Network Associate which is a certification course for the people who want to make their careers in IT. We have tried to cover all the most frequently asked CCNA interview questions. This is an associate-level course which means freshers can also apply for that. With this certification, networking experts can enhance their knowledge in the aspects of configuring and troubleshooting network issues.

Once you have achieved your certification, now you have to prepare yourself for the interview. Here in this article, we have listed the best CCNA interview questions, which are going to help you in cracking your interview.

Most Frequently Asked CCNA Interview Questions

Here in this article, we will be listing frequently asked CCNA Interview Questions and Answers with the belief that they will be helpful for you to gain higher marks. Also, to let you know that this article has been written under the guidance of industry professionals and covered all the current competencies.

1. What is the size of an IP address?

The IP address has 2 versions available today. IPv4 and IPv6.

  • IPv4 is 32 bits or 4 bytes.
  • IPv6 is 128 bits or 16 bytes.
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2. What is Networking?

A network is a system of interconnected devices that communicate using some protocols (or standards) to exchange resources and services.

Note: This is one of the CCNA basic interview questions usually asked in the HR round.

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3. Name all layers of the OSI model?

In the OSI model, seven layers are there:

  • Physical Layer
  • Data Link Layer
  • Network Layer
  • Transport Layer
  • Session Layer
  • Presentation Layer
  • Application Layer

Note: OSI model and TCP IP model questions are one of the most asked questions among the CCNA interview questions. Study both of them in detail.

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4. What do you mean by the Switch and why are we using Switches?

A hardware device that filters and transfers network data packets from one device to another is called a switch. Switches are intelligent as they find the shortest way to transfer data packets and you can transfer data to a particular host instead of sending it to all connected devices.

Switches are used for sharing resources by connecting all the devices like servers, computers, scanners, etc where they can communicate with each other.

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5. How would you differentiate between the Switches, Routers, and the Hub?
Switches Routers Hub
Datalink layer Network layer Physical layer
They are used in LAN They are used in LAN, MAN, and WAN They are used in LAN
It has the speed of 1Gbps It has the speed of 1-100Mbps in case of wireless 100Mbps-1Gbps in case of wired It has the speed of 10Mbps
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6. Define Network Congestion?

Network congestion is a poor quality of networking service that occurs when a channel or link carries more data than it can handle. This results in data packets loss, queuing delays, and blocking of new network connections.

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7. How would you differentiate between LAN, MAN, and WAN?
The abbreviation for LAN is Local Area Network The abbreviation for MAN is Metropolitan Area Network The abbreviation for WAN is Wide Area Network
It is limited to small areas like schools, colleges, hospitals, etc. It covers towns, cities, etc. It has a much larger radius than a LAN and WAN and establishes communication between countries.
The transmission speed is fast in LAN The transmission speed is average It has a low transmission speed
Design and maintenance are easy Design and maintenance are difficult compared to LAN. Design and maintenance are very difficult.
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8. What is PING used for?

PING is a networking utility that is used to check whether the host is reachable over a network or not.

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9. Could you please tell me the difference in static and dynamic IP addressing?
Static IP Address Dynamic IP Address
Static IP Address does not change with time. Dynamic IP Address changes with time.
It is less secured. It is very secured because of its volatility.
Devices that use Static IP addresses can be tracked easily. Devices that use Dynamic IP address is difficult to track.
Highly stable but costly. Less stable but cheaper.
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10. How many types of memories are used in the Cisco router?

There are 4 types of memories in a Cisco Router.

  • RAM (Random Access Memory)
  • ROM (Read Only Memory)
  • NVRAM (Non-Volatile Random Access Memory)
  • Flash Memory
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We have tried to cover all the commonly asked CCNA basic interview questions but if you think and found that we are missing something, please feel free to share your thoughts in the comment section.