Updated June 12, 2023
Introduction to Computer Network Interview Questions and Answers
Computer Network is a set of computers connected to each other for sharing resources. The major sharing of resources over the connection is the Internet. Another example of a Computer network-sharing resource is sharing one printer between different computers by connecting it. The best example of a computer network is the Internet.
Below are mentioned the topmost questions asked in the interview
Now, if you are looking for a job related to the Computer Network, you need to prepare for the 2023 Computer Network Interview Questions. Every interview is indeed different as per the different job profiles. Here, we have prepared the important Computer Network Interview Questions and Answers which will help you get success in your interview. These top interview questions are divided into two parts as follows:
Part 1 – Computer Network Interview Questions (Basic)
This first part covers basic Interview Questions and Answers.
Q1. What do you mean by the network?
Answer:
A set of devices connected to each other over the physical medium is known as a computer network. For example, the Internet.
Q2. What do you mean by node?
Answer:
In the computer network, the node is known as a device.
Q3. What do you mean by Network Topology?
Answer:
A network topology is a physical structure of the network that defines how the computers or nodes will be connected to each other.
Q4. What is Routers?
Answer:
A router is a device that sends data from source to destination over the computer network.
Q5. What is the OSI model?
Answer:
OSI model stands for Open System Interconnection. It’s a reference model describing how different applications will communicate over the computer network.
Q6. Explain the Different layers of the OSI model.
Answer:
The different layers of the OSI model are given below:
| Physical Layer | Converts data bits into an electrical impulse. |
| Datalink Layer | A data packet will be encoded and decoded into bits. |
| Network Layer | Transfer of datagrams from one to another. |
| Transport Layer | Responsible for Data transfer from one to another. |
| Session Layer | Manage and control signals between computers. |
| Presentation Layer | Transform data into application layer format. |
| Application Layer | An end user will interact with the Application layer. |
Q7. Describe Hub, Switch, and Router.
Answer:
- Hub: Hub will broadcast all data to every port. It has a common connection point for all devices.
- Switch: The switch will create a dynamic connection and provide information to the requesting port.
- Router: The router is the device responsible for forwarding data packets.
Let us move to the next Computer Network Interview Questions.
Q8. What do you mean by the TCP/IP Model?
Answer:
TCP/IP stands for Transmission control protocol and Internet protocol. It describes how the data will get transmitted and routed from end-to-end communication.
Q9. Explain the different Layers of the TCP/IP Model.
Answer:
Application Layer, Transport Layer, Network or Internet Layer, and Network interface layer.
Q10. What do you mean by HTTP?
Answer:
HTTP stands for Hyper Text Transfer Protocol, and the port is 80. This protocol is responsible for web content.
Q11. What do you mean by TCP and UDP?
Answer:
TCP stands for Transfer control protocol, UDP stands for User Datagrams protocol, TCP is a connection-oriented protocol, and UDP is a Connectionless protocol.
Q12. What do you mean by a Firewall?
Answer:
A firewall is a security system that will help computers protect them from unauthorized access or any cyber-attack.
Part 2 – Computer Network Interview Questions (Advanced)
Let us now have a look at the advanced Interview Questions.
Q13. What do you mean by DNS?
Answer:
DNS Stands for Domain Name System. It’s an internet address mapping process with the local name. We can also call it an internet phonebook.
Q14. What do you mean by Proxy server?
Answer:
A proxy server prevents external users who are unauthorized to access the network.
Q15. What do you mean by Classes of Network?
Answer:
The Classes of IPV4 are of 5 types:
| Class A | 0.0.0.0 to 127.255.255.255 |
| Class B | 128.0.0.0 to 191.255.255.255 |
| Class C | 192.0.0.0 to 223.255.255.255 |
| Class D | 224.0.0.0 to 239.255.255.255 |
| Class E | 240.0.0.0 to 247.255.255.255 |
Let us move to the next Computer Network Interview Questions.
Q16. What do you mean by NIC?
Answer:
NIC stands for Network interface card. It is an adapter that will be installed on the computer, and because of that NIC, only that computer will interact with the network.
Q17. What do you mean by ASCII?
Answer:
ASCII is the American Standard Code for Information Interchange.
Q18. What are the types of modes available in the network?
Answer:
Data transferring mode in a computer network will be of three types:
Simplex, Half-Duplex, and Full Duplex.
Q19. What do you mean by SLIP protocol?
Answer:
SLIP stands for Serial Line Interface Protocol. It sends an IP datagram over a network in a single line.
Let us move to the next Computer Network Interview Questions.
Q20. What are the key elements of the protocol?
Answer:
There are three key elements of the protocol:
- Syntax: Describe the format of the data.
- Semantics: Describe the meaning of each section.
- Timings: Explain the timing of how fast the data can be sent.
Q21. What do you mean by Decoder?
Answer:
A decoder is a program that converts the encrypted data into its actual format.
Q22. What is the role of IEEE in the world of computer networks?
Answer:
The IEEE full form is the Institute of Electrical and Electronic Engineers, which defines and develops the standards used over the network.
Q23. What is the maximum segment length of a 100Base-FX network?
Answer:
The maximum segment length will be 412 meters.
Conclusion
These are the above crucial questions related to Computer networks. The key topics which you have to cover are the OSI model, All layers functionality, Classful Networks and classes of the IPv4, Topologies, and configuring VPN and VPC.
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