STJ Electronics Customer Support Engineer/Technician Interview Questions and Answers

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

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 pro...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.

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, ...read more

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 ...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.