STJ Electronics Interview Questions and Answers

Networking is the process of connecting devices together to share resources and communicate with each other.

• Networking involves the use of hardware and software to create a communication system between devices.

• It allows devices to share resources such as printers, files, and internet connections.

• Networking can be done using wired or wireless connections.

• Examples of networking technologies include Ethernet, Wi-Fi, and B...read more

OSI TCP is a protocol used for communication between devices on a network.

• OSI TCP stands for Open Systems Interconnection Transmission Control Protocol.

• It operates at the transport layer of the OSI model.

• It provides reliable, ordered, and error-checked delivery of data between applications.

• Examples of applications that use OSI TCP include web browsers, email clients, and file transfer programs.

TCP is a connection-oriented protocol while UDP is connectionless.

• TCP provides reliable, ordered, and error-checked delivery of data while UDP does not guarantee any of these.

• TCP is slower but more reliable while UDP is faster but less reliable.

• TCP is used for applications that require high reliability and accuracy while UDP is used for applications that require speed and efficiency.

• Examples of TCP-based applications i...read more

DNS, HTTP, and DHCP are all protocols used in computer networking.

• DNS (Domain Name System) is used to translate domain names into IP addresses.

• HTTP (Hypertext Transfer Protocol) is used for communication between web servers and clients.

• DHCP (Dynamic Host Configuration Protocol) is used to assign IP addresses to devices on a network.

DHCP is a protocol that assigns IP addresses to devices on a network automatically.

• DHCP stands for Dynamic Host Configuration Protocol

• DHCP server assigns IP addresses to devices on a network

• DHCP lease time determines how long an IP address is assigned to a device

• DHCP relay agent is used to forward DHCP messages between different networks

• DHCP discovery, offer, request, and acknowledgement are the four steps in the DHCP ...read more

HTTP works on port 80 by default.

• HTTP (Hypertext Transfer Protocol) is the protocol used for transmitting data over the internet.

• Port 80 is the default port used for HTTP communication.

• However, HTTPS (HTTP Secure) uses port 443 by default.

• Other ports can also be used for HTTP communication, but they need to be specified explicitly.

• For example, if a website uses port 8080 for HTTP communication, the URL would be http://...read more

OSI stands for Open Systems Interconnection. It is a conceptual model that describes how data is transmitted over a network.

• OSI model has 7 layers, each with a specific function

• It is a reference model, not an implementation

• Each layer communicates with the layer above and below it

• Examples of protocols that operate at different layers include TCP/IP, HTTP, and FTP

DHCP is a network protocol that assigns IP addresses to devices. DNS is a system that translates domain names to IP addresses.

• DHCP stands for Dynamic Host Configuration Protocol

• It automatically assigns IP addresses to devices on a network

• It also provides other network configuration information

• DNS stands for Domain Name System

• It translates domain names to IP addresses

• This allows devices to access websites and other reso...read more

ISI model is a framework for analyzing and improving customer support interactions.

• ISI stands for Interaction, Satisfaction, and Issue resolution.

• It helps identify areas for improvement in customer support processes.

• The model focuses on the customer's experience throughout the interaction.

• Example: Was the customer satisfied with the resolution of their issue?

• Example: Was the interaction handled efficiently and professi...read more

HTTP uses port 80, FTP uses port 21, VPN can use various ports depending on the protocol.

• HTTP uses port 80 by default

• FTP uses port 21 by default

• VPN can use various ports depending on the protocol, such as PPTP using port 1723 and L2TP using port 1701

• Some VPN protocols can also use port 443, which is the same port used for HTTPS traffic