20+ ProPhecy Technologies Interview Questions and Answers

DNS is a system that translates domain names into IP addresses. To change DNS IP address in Windows, go to Network and Sharing Center and modify the DNS settings. In MAC, go to System Preferences and change the DNS settings.

• DNS stands for Domain Name System

• It translates domain names into IP addresses

• In Windows, go to Network and Sharing Center, select the network connection, click on Properties, and modify the DNS settings

• In MAC, go to System Preferences, select Network, choo...read more

I would ask the customer to explain the issue in detail and try to replicate it on my end to provide a solution.

• Ask the customer to provide more information about the issue

• Try to replicate the issue on your end

• Provide a solution or escalate the issue to a higher level of support if necessary

Communication between 7 layers of 2 computers happens through the OSI model.

• OSI model defines 7 layers of communication

• Each layer has a specific function and communicates with the corresponding layer on the other computer

• Data is encapsulated and de-encapsulated at each layer

• Examples of protocols at each layer include HTTP, TCP, and Ethernet

To fix camera issue in MAC and windows computer, follow these steps:

• Check if the camera is properly connected

• Check if the camera is enabled in the device settings

• Check if any other application is using the camera

• Update the camera driver

• Restart the computer

IP addresses are divided into classes based on the range of numbers they use to identify devices on a network.

• There are five classes of IP addresses: A, B, C, D, and E.

• Class A addresses are used for large networks and start with a number between 1 and 126.

• Class B addresses are used for medium-sized networks and start with a number between 128 and 191.

• Class C addresses are used for small networks and start with a number between 192 and 223.

• Class D addresses are used for multic...read more

IO devices require specific drivers to be installed for proper functioning.

• Identify the device and its manufacturer

• Download the appropriate driver from the manufacturer's website

• Run the installer and follow the on-screen instructions

• Restart the computer if prompted

• Verify the device is working properly in Device Manager

JavaScript is a programming language used to create interactive web pages and web applications.

• JavaScript is a client-side scripting language.

• It is used to add interactivity to web pages.

• It can be used for form validation, creating animations, and manipulating HTML and CSS.

• JavaScript can also be used on the server-side with Node.js.

• Popular JavaScript frameworks include React, Angular, and Vue.js.

Basics steps to use a browser

• Open the browser

• Type the URL in the address bar

• Press Enter

• Wait for the page to load

• Use the back and forward buttons to navigate

• Use the refresh button to reload the page

• Use the search bar to search for specific content

• Use bookmarks to save frequently visited pages

The range for APIPA address is 169.254.0.1 to 169.254.255.254.

• APIPA stands for Automatic Private IP Addressing.

• It is a feature in Windows operating systems that allows a computer to automatically assign itself an IP address when no DHCP server is available.

• APIPA addresses are not routable and can only be used on a single network segment.

• Examples of APIPA addresses are 169.254.1.1, 169.254.2.2, etc.

Public IP is the address assigned to a device that is visible on the internet, while private IP is the address assigned to a device on a local network.

• Public IP is unique and can be accessed from anywhere on the internet

• Private IP is used within a local network and is not visible on the internet

• Public IP can be static or dynamic, while private IP is usually dynamic

• Examples of public IP include 216.3.128.12 and 74.125.224.72

• Examples of private IP include 192.168.0.1 and 10.0.0...read more

IPv4 and IPv6 are two versions of Internet Protocol used to identify devices on a network.

• IPv4 uses 32-bit addresses and can support up to 4.3 billion unique addresses.

• IPv6 uses 128-bit addresses and can support an almost infinite number of unique addresses.

• IPv4 addresses are written in decimal format, while IPv6 addresses are written in hexadecimal format.

• IPv6 addresses are typically enclosed in square brackets, like [2001:0db8:85a3:0000:0000:8a2e:0370:7334].

An Internet Protocol address is a numerical label assigned to each device connected to a computer network that uses the Internet Protocol for communication.

• IP address is a unique identifier for devices on a network

• It consists of four sets of numbers separated by dots

• IPv4 addresses are 32-bit and IPv6 addresses are 128-bit

• Examples of IP addresses are 192.168.0.1 and 2001:0db8:85a3:0000:0000:8a2e:0370:7334

DORA process is a DHCP process that stands for Discover, Offer, Request, and Acknowledge.

• DORA is a four-step process used by DHCP clients to obtain an IP address from a DHCP server.

• Discover: The client broadcasts a message to discover available DHCP servers.

• Offer: The DHCP server responds with an offer of an IP address.

• Request: The client requests the offered IP address.

• Acknowledge: The DHCP server acknowledges the request and assigns the IP address to the client.

• DORA process...read more

POP (Post Office Protocol) is a protocol used to retrieve email from a mail server.

• POP is used to download email from a mail server to a local email client.

• It is an application layer protocol that uses TCP port 110.

• POP3 is the latest version of the protocol and supports SSL encryption.

• POP is different from IMAP (Internet Message Access Protocol) which allows users to access emails directly from the server.

• POP is commonly used by email clients like Microsoft Outlook and Apple ...read more

A MAC address is a unique identifier assigned to a network interface controller for use as a network address in communications within a network segment.

• MAC stands for Media Access Control

• It is a 48-bit address, usually represented in hexadecimal format

• It is used to identify devices on a network

• MAC addresses are assigned by the manufacturer of the device

• MAC addresses are used in the data link layer of the OSI model

A port number is a 16-bit unsigned integer, thus ranging from 0 to 65535, used to identify a specific process to which an Internet or other network message is to be forwarded when it arrives at a server.

• Port numbers are used to identify specific processes running on a server.

• They are 16-bit unsigned integers ranging from 0 to 65535.

• Well-known port numbers are reserved for specific services, such as HTTP (port 80) and FTP (port 21).

• Port numbers are used in conjunction with IP ...read more

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

• DHCP is used to simplify network administration by automating the IP address assignment process.

• It allows devices to obtain an IP address, subnet mask, default gateway, and DNS server information automatically.

• DHCP servers can be configured to assign specific IP addresses to specific devices based on their MAC addresses.

• DHCP lease time determines ho...read more

A cookie is a small text file that a website stores on a user's computer or mobile device when they visit the site.

• Cookies are used to remember user preferences and login information.

• They can also be used for tracking user behavior and serving targeted ads.

• Cookies can be either first-party (set by the website being visited) or third-party (set by a different website).

NAT stands for Network Address Translation. It is a process of modifying IP address information in IP packet headers.

• NAT is used to allow devices on a private network to access the internet using a single public IP address.

• It can be used to hide the internal IP addresses of a network from the internet.

• NAT can be implemented using hardware devices or software applications.

• There are different types of NAT such as Static NAT, Dynamic NAT, and Port Address Translation (PAT).