Networking Interview Questions and answer
here we wil discuss Networking Interview Questions and answer. We’ve put together a list of the most often asked Networking Interview Questions and Answers to assist you prepare for the Networking basics interview questions you might be asked during your interview. We’ve covered all of the most regularly asked basic and advanced networking interview questions in our list of Networking interview questions, along with extensive answers to help you ace the job interview.
In Networking Interview Questions and answer the following list includes 130+ relevant Networking interview questions for freshers as well as Networking interview questions for experienced applicants. This comprehensive list of Network Engineer interview questions will assist you in effortlessly passing your job interview.
Nobody in today’s modern technology environment has never used the Internet. With the use of the Internet, one can simply discover an answer/solution to whatever he or she does not know.
People used to go through all of the relevant books and resources available page by page before appearing in an interview. But the Internet has made everything so simple. Nowadays, there are numerous sets of interview questions and answers readily available.As a result, preparation for an interview has grown much easier in recent years.
1.What exactly is a network?
According to Merriam Webster, a network is an informal organisation or affiliation of various elements such as people, computers, radio stations, and so on.
Domino’s Pizza, for example, has 1232 locations throughout India. As the name implies. A computer network is a collection of peripherals or computers that are linked together and share a common communication channel for exchanging various sorts of data and information.
2.Why is the computer network so important?
Have you heard of the Internet, often known as the NET? I’m guessing you have, because you’re reading this post on Interviewbit while surfing the web. However, have you considered the internet? The Internet is a network of networks that connects all different network-enabled devices and allows them to share data and information, making computer networks an essential element of our lives and technical interviews.
The following is a collection of all of the most often asked networking questions in technical interviews, ranging from basic to sophisticated.
3. Explain LAN (Local Area Network)
LANs are commonly used to connect computers, laptops, and consumer gadgets, allowing them to share resources (such as printers and fax machines) and exchange data. Enterprise networks are LANs that are used by businesses or organisations. There are two types of LAN networks: wireless LAN (which uses Wi-Fi to eliminate the need for wires) and wired LAN (achieved using LAN cable). Wireless LANs are becoming increasingly popular in regions where laying wire is challenging. Both wireless and wired LANs are explained in the illustrations below.
4. Tell me something about VPN (Virtual Private Network)
The Virtual Private Network (VPN) is a private internet-based WAN (Wide Area Network). It enables the building of a secure tunnel (protected network) via the internet between separate networks (public network). A client can connect to the organization’s network remotely by using the VPN.
5. What are nodes and links?
A node is any device that communicates in a network. In a network, a node is a point of intersection. Within a network, it can send and receive data and information. Computers, laptops, printers, servers, modems, and other nodes are examples of nodes.
A link, also known as an edge, is the connection between two nodes in a network. It specifies the type of connectivity (wired or wireless) between the nodes as well as the protocols that allow one node to communicate with another.
6. What are the HTTP and the HTTPS protocol?
The HyperText Transfer Protocol (HTTP) is a set of rules and standards that govern how information can be exchanged over the Internet (WWW). It facilitates communication between web browsers and web servers. It’s a’stateless protocol,’ meaning that each instruction is unrelated to the one before it. TCP provides the foundation for HTTP, which is an application layer protocol. By default, it utilises port 80.
The HyperText Transfer Protocol Secure, sometimes known as Secure HTTP, is a secure version of the HyperText Transfer Protocol. It’s a more sophisticated and secure version of HTTP. The SSL/TLS protocol is used to add security on top of HTTP. It enables secure transactions by encrypting communication and also assists in the secure identification of network servers. By default, port 443 is used.
7. What is the SMTP protocol?
The Simple Mail Transfer Protocol (SMTP) stands for Simple Mail Transfer Protocol. SMTP establishes the rules for server communication. This set of guidelines assists the software in sending emails via the internet. End-to-end and Store-and-Forward techniques are both supported. On port 25, it is in always-listening mode.
8. What is the Domain Name System (DNS)?
The Domain Name System (DNS) is an acronym for Domain Name System. It is regarded as the Internet’s device/services directory. It’s a hierarchical and decentralised naming system for Internet-connected objects and services. It converts domain names to IP addresses and vice versa. For example, send an email to 126.96.36.199 with the subject interviewbit.com. By default, it utilises port 53.
9. What is a router’s purpose, and how does it vary from a gateway?
A router is a networking device that joins two or more network segments together. It manages the network’s traffic. It sends packets of information and data from the source to the destination, such as web pages, emails, photos, and videos. It’s a network layer application. In addition to routing and regulating network traffic, gateways can also transport data between two dissimilar networks, whereas a router can only send data between similar networks.
10. What is the TCP (Transmission Control Protocol) protocol?
The Transmission Control Protocol/Internet Protocol (TCP/IP) is the Transmission Control Protocol/Internet Protocol. It’s a collection of guidelines that determine how a computer connects to the Internet and how data is transmitted across the network. When more than one computer is connected to the network. It generates a virtual network and establishes the connection using the three-way handshake model. which makes it more reliable.
11. What is the Unicast Datagram Protocol (UDP)?
The User Datagram Protocol (UDP) is a datagram-based protocol. It is mostly used for multicasting and broadcasting purposes. Except for the three forms of handshaking and error checking, its functioning is nearly identical to that of the TCP/IP Protocol. It uses a basic transmission method that does not include hand shaking, making it less dependable.
12. What is the Internet Control Message Protocol (ICMP)?
The Internet Control Message Protocol (ICMP) stands for Internet Control Message Protocol. It is an error-handling network layer protocol. It is mostly used by network devices such as routers to diagnose network connection faults and is essential for error reporting and determining. whether data is reaching the desired destination in a timely manner. By default, port 7 is used.
13. What is a MAC address and how does it relate to a network interface card (NIC)?
The Media Access Control address is referred to as the MAC address. It is a 48-bit or 64-bit unique identification for network devices. It’s also known as the physical address associated with the Data Link Layer’s Network Interface Card (NIC). A network interface card (NIC) is a hardware component in a networking device that allows a device to connect to a network.
14. What exactly is a firewall?
The firewall is a network security device that monitors and filters incoming and outgoing traffic according to firewall security regulations. Firewall serves as a barrier between the internet (public network) and networking equipment (a private network).
It might be a hardware gadget, a software programme, or a hybrid of the two. It adds a layer of security to the network.
15.What are Routers and How Do They Work?
A router is a network device that links two or more network segments together. It is used to move data from one location to another.
Routers send data in the form of packets. And when these packets are forwarded from one router to another, the router scans the network address in the packets to determine the destination network.