RAID 1 would be mirroring. RAID 0 striping and therefore no redundancy.
RAIDs 5 & 6 require a minimum 3/4 disks so cannot be the answer here.
https://www.prepressure.com/library/technology/raid

The chmod command is used to change the permissions of files and directories. The g+w option means to grant write permission to the group owner of the file. Since Joe is a member of the IT group, which is also the group owner of the file, this command will allow him to save changes to the file without affecting the permissions of other users. Verified References: [Linux chmod command]

Explanation
An incremental backup only backs up files that have changed since the last backup, whether it was a full or an incremental backup. Therefore, an incremental backup file may require another file to restore data, depending on the sequence of backups. A full backup backs up all files and does not require any other file to restore data.
A snapshot is a point-in-time copy of data that does not depend on other files. A differential backup backs up files that have changed since the last full backup and does not require any other file to restore data.

* The ping command output shows that the NIC has an IP address of 192.168.1.100 and a default gateway of 192.168.1.1. However, when the technician tries to ping the default gateway, the reply comes from another IP address: 192.168.1.101. This means that there is another device on the network that has the same IP address as the default gateway, and it is responding to the ping request instead of the intended destination.
* A duplicate IP address can cause network connectivity problems, such as packet loss, routing errors, or unreachable hosts. To resolve this issue, the technician should either change the IP address of the default gateway or the device that is conflicting with it, or use DHCP to assign IP addresses automatically and avoid conflicts.
* The other options are not correct because they do not explain the ping output. An incorrect default gateway would cause no reply or a destination unreachable message, not a reply from a different IP address. A DHCP misconfiguration would cause an invalid or no IP address on the NIC, not a duplicate IP address on the network. An incorrect routing table would cause routing errors or unreachable destinations, not a reply from a different IP address.
References:
* https://askleo.com/what_is_ping_and_what_does_its_output_tell_me/
* https://learn.microsoft.com/en-us/windows-server/administration/windows-commands/ping

Explanation
The DR testing scenario that is described as verbally walking through each step of the DR plan in the context of a meeting is tabletop. A tabletop test is a type of disaster recovery (DR) test that involves discussing and reviewing the DR plan with key stakeholders and participants in a simulated scenario. A tabletop test does not involve any actual execution of the DR plan or any disruption of the normal operations. A tabletop test can help identify gaps, issues, or inconsistencies in the DR plan and improve communication and coordination among the DR team members.