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➡️ Heyy! Are you ready to crack the SDE interview and yes computer networking is essential for software development.
- Have you ever wondered? How does the internet work, How does Computer works, what are the computer Architectures- This is the sort of mindset you need to have if you wanna be a great developer of the era.
In this Blog, I will try to mention all the related questions starting from how the internet works and you will be learning all these.
➡️ I will be adding all the important questions to the table and a precise single solution be added.
Define Network. | Two or more devices are connected in order to share resources. |
What do you mean by network topology, and explain the types of them | Physical and Logical Arrangement of nodes and connections in the network There are 5 Basic Topologies & 2 Common Topologies : |
Define bandwidth, node and link. | max amount of data transmitted over an internet connection in a given amount of time Node: connection point among network devices Link: Physical Path Channel: Portion of the link that carries transmission b/w given pair of lines |
Explain TCP Model | 5 types of layers Application layer- Provides the Interface and protocols needed Transport Layer- provides end to end solution for reliable communication Network Layer-Accepts and delivers packets for the network Datalink Layer- Error control and framing Physical Layer- Describes hardware standards |
Layers of OSI model | 7 Layers of OSI Model Application layer- Provides the Interface and protocols needed Transport Layer- End to End delivery of complete message Session Layer- responsible for the establishment of connection, maintenance of sessions, authentication, and also ensures security. Presentation Layer- The data from the application layer is extracted here and manipulated as per the required format Network Layer-Accepts and delivers packets for the network Datalink Layer- Error control and framing Physical Layer- Describes hardware standards |
Significance of Data Link Layer | Deals with transmission errors regulate the flow of data and provide a well-defined interface to the network layer. |
Define gateway and router. | Gateway- Network way that acts as an entry to point another Network Router- connects two/more networks and allows multiple devices to use the same network connection |
What does the ping command do? | used to troubleshoot connectivity, and reachability and used to test the ability of the source computer to reach specified destination computer |
What are DNS, DNS forwarder, and NIC? | DNS- Domain Name System, Basically it translates humanly reachable domain names into machine-readable IP addresses. DNS Forwarder: the process of forwarding DNS Requests from one server to another NIC- Network Interface Card/ Controller is a hardware component installed on the computer so it can connect to the network, NIC is essential in establishing communication blw computers. |
What is MAC address? | Media Access Control uniquely identifies each device on a given network, MAC is hard coded on (NIC) and cannot be changed, However many drivers allow MAC addresses to be changed. |
What is an IP address, private IP address, and public IP address? | Internet protocol address, used for Identification and location of the network device. (32-bit) An IP address is an identifier that enables your devices to send/receive data packets across the internet. Public: Required by Devices and hosts that connect directly to the internet and must be globally unique, and routable on the Internet Private: not routable on the internet, can be assigned locally by the organization |
Difference between IPv4 and IPv6 | IPV4 had a 32-bit address length and IPV6 has a 128-bit address length, Adress Representation in IPV4 is decimal and IPV6 is hexadecimal. IPV4 checksum fields are available and the IPV6 checksum field is not available, IPV4 can be converted to IPV6 and not all IPV6 can be converted to IPV6. |
What is a subnet? | Subnetting is when a bigger network is divided into smaller networks than to main security. a subnet is a segmented piece of a larger network. |
Firewalls | Firewalls guard traffic at a computer's entry point. |
Delay | The amount of time required for a packet to go from its source to a destination. |
3 way handshaking | to establish a reliable connection between server and client in TCP/IP |
TCP & UDP | TCP ensures that the data reaches its destination, User Datagram Protocol is used to access the internet for time-sensitive transmission |
RSA Algorithm | Rivest Shamir Aldeman Algorithim is used in secure data trasmission |
What is HTTP and HTTPS protocol ? | HTTPS is a secure version of HTTP, which is basically used to send data b/w browser and website |
What is SMTP protocol? | SMTP is a set of guidelines that are used to send and receive emails between the sender and receiver |
What happens when you enter “google.com” | TCP/IP establishes a connection with the browser & server that hosts the website. |
➡️ These are some basic questions asked in SDE interviews, if you are a fresher and preparing for interviews hoping this blog might help you.
🤩🤗 ALL THE BEST FOR YOUR FUTURE ENDEAVOURS