Progressive Infotech Desktop Support Engineer L2 Interview Questions, Process, and Tips

DHCP stands for Dynamic Host Configuration Protocol. It is a network protocol that automatically assigns IP addresses to devices on a network.

• DHCP server assigns IP addresses to devices on a network

• Helps in reducing manual configuration of IP addresses

• DHCP lease time determines how long an IP address is valid for

• DHCP Discover, Offer, Request, Acknowledge (DORA) process

• Example: When a device connects to a network, it se...read more

IP address is a unique numerical label assigned to each device connected to a computer network.

• Identifies devices on a network

• Facilitates communication between devices

• Allows devices to send and receive data packets

• Can be IPv4 (e.g. 192.168.1.1) or IPv6 (e.g. 2001:0db8:85a3:0000:0000:8a2e:0370:7334)

DNS is a system that translates domain names to IP addresses, allowing users to access websites using human-readable names.

• DNS stands for Domain Name System

• It helps in translating domain names (like www.google.com) to IP addresses (like 172.217.3.206)

• DNS is crucial for internet functionality as it allows users to access websites using easy-to-remember names

Default gateway is a network device that connects different networks together, allowing devices on one network to communicate with devices on another network.

• Default gateway is usually the IP address of the router that connects a local network to the internet.

• It acts as an entry and exit point for network traffic between different networks.

• Without a default gateway, devices on a network would not be able to communicate...read more

Blue Screen of Death (BSOD) is a Windows operating system error screen that appears when a system encounters a critical error.

• BSOD is a stop error screen that appears when the Windows operating system encounters a critical error that it cannot recover from.

• Common causes of BSOD include hardware failures, driver issues, software conflicts, and corrupt system files.

• To fix BSOD, you can try restarting the computer, checki...read more

Active Directory is a directory service developed by Microsoft for Windows domain networks.

• Centralized database for managing network resources

• Stores information about users, computers, and other network objects

• Allows administrators to control access and permissions

• Facilitates single sign-on for users across network services

• Enables group policy management for network-wide settings

The colour coding of a cross cable is different on each end to allow for direct connection between two devices.

• The colour coding on one end of the cross cable follows the T568A standard, while the other end follows the T568B standard

• This allows for the direct connection of two devices without the need for a switch or hub in between

• Commonly used for connecting two computers directly or connecting a computer to a printer

To install a proxy certificate in a user's machine, you need to import the certificate into the user's browser or operating system.

• Export the proxy certificate from the source (e.g. email, website)

• Import the certificate into the user's browser or operating system settings

• Verify the installation by accessing a website that requires the proxy certificate

VPN is a technology that allows users to securely connect to a private network over the internet.

• VPN encrypts data to ensure privacy and security

• It allows users to access resources on a private network remotely

• Commonly used for remote work, accessing geo-restricted content, and enhancing online security

• Examples include NordVPN, ExpressVPN, and Cisco AnyConnect