Explanation:
To list the IPv4 addresses associated with the host name www.companypro.net, you should use the following command:
nslookup www.companypro.net
This command will query the DNS servers to find the IP address associated with the hostname provided. If you want to ensure that it returns the IPv4 address, you can specify the -type=A option, which stands for Address records that hold IPv4 addresses1. However, the nslookup command by default should return the IPv4 address if available.
To list the IPv4 addresses associated with the host name www.companypro.net, you should use the nslookup command.
Command: nslookup
Target: www.companypro.net
So, the completed command is:
nslookup www.companypro.net
nslookup: This command is used to query the Domain Name System (DNS) to obtain domain name or IP address mapping or for any other specific DNS record.
www.companypro.net: This is the domain name you want to query to obtain its associated IP addresses.
Reference: Using nslookup: nslookup Command Guide

SFTP, or Secure File Transfer Protocol, is a protocol that allows for secure file transfer capabilities between networked hosts. It is a secure extension of the File Transfer Protocol (FTP). SFTP encrypts both commands and data, preventing passwords and sensitive information from being transmitted openly over the network. It is typically used for secure file transfers over the internet and is built on the Secure Shell (SSH) protocol1.
Reference: =
* What Is SFTP? (Secure File Transfer Protocol)
* How to Use SFTP to Safely Transfer Files: A Step-by-Step Guide
* Secure File Transfers: Best Practices, Protocols And Tools
The Secure File Transfer Protocol (SFTP) is a secure version of the File Transfer Protocol (FTP) that uses SSH (Secure Shell) to encrypt all commands and data. This ensures that sensitive information, such as usernames, passwords, and files being transferred, are securely transmitted over the network.
* ICMP (Internet Control Message Protocol) is used for network diagnostics and is not designed for file transfer.
* NTP (Network Time Protocol) is used to synchronize clocks between computer systems and is not related to file transfer.
* HTTP (HyperText Transfer Protocol) is used for transmitting web pages over the internet and does not inherently provide secure file transfer capabilities.
Thus, the correct protocol that allows secure uploading of files to another computer on the internet is SFTP.
Reference: =
* Cisco Learning Network
* SFTP Overview (Cisco)

Explanation:
The correct matching of the MFA factors to their examples is as follows:
Entering a one-time security code sent to your device after logging in: Possession
Holding your phone to your face to be recognized: Inherence
Specifying your user name and password to log on to a service: Knowledge
Here's why each factor matches the example:
Possession: This factor is something the user has, like a mobile device. A one-time security code sent to this device falls under this category.
Inherence: This factor is something the user is, such as a biometric characteristic. Facial recognition using a phone is an example of this factor.
Knowledge: This factor is something the user knows, like a password or PIN.
Multi-Factor Authentication (MFA) enhances security by requiring two or more of these factors to verify a user's identity before granting access.
Entering a one-time security code sent to your device after logging in.
Factor: Possession
This factor relates to something you have, such as a device that receives a security code.
Holding your phone to your face to be recognized.
Factor: Inference (typically referred to as Inherence or Biometric)
This factor relates to something you are, such as biometric authentication like facial recognition.
Specifying your username and password to log on to a service.
Factor: Knowledge
This factor relates to something you know, such as a username and password.
Possession Factor: This involves something the user has in their possession. Receiving a one-time security code on a device (e.g., phone) is an example of this.
Inference Factor (Inherence/Biometric): This involves something inherent to the user, such as
biometric verification (e.g., facial recognition or fingerprint scanning).
Knowledge Factor: This involves something the user knows, such as login credentials (username and password).
Reference: Multi-Factor Authentication (MFA) Explained: MFA Guide
Understanding Authentication Factors: Authentication Factors