The power supply and the hard drive are two components that can most likely be swapped out while the server is still running, if they support hot swapping or hot plugging. Hot swapping or hot plugging means that the device can be added or removed without shutting down the system. The operating system automatically recognizes the changes that have been made. This feature is useful for minimizing downtime and improving availability. The CPU, the GPU, the cache, and the RAM are not hot swappable and require the system to be powered off before replacing them. Reference: https://www.geeksforgeeks.org/what-is-hot-swapping/ https://www.howtogeek.com/268249/what-is-hot-swapping-and-what-devices-support-it/

The server type that would benefit most from the use of a load balancer is web server. A web server is a server that hosts web applications or websites and responds to requests from web browsers or clients. A load balancer is a device or software that distributes network traffic across multiple servers based on various criteria, such as availability, capacity, or performance. A load balancer can improve the scalability, reliability, and performance of web servers by balancing the workload and preventing any single server from being overloaded or unavailable.
Reference:
https://www.dnsstuff.com/what-is-server-load-balancing

A MD5 checksum is a value that is calculated from a file using a cryptographic hash function. A MD5 checksum is used to verify the integrity of a file by comparing it with the original value provided by the manufacturer or the source. If the MD5 checksums match, it means that the file is authentic and has not been corrupted or tampered with. If the MD5 checksums do not match, it means that the file is potentially corrupt or malicious and should not be installed12. A DLF configuration (A) is a setting that determines how a dynamic link library (DLL) is loaded into memory and executed by an application. A DLF configuration does not check the integrity of a file. A MBR failure (B) is a problem that occurs when the master boot record (MBR) of a disk is damaged or corrupted, preventing the system from booting. A MBR failure does not check the integrity of a file. ECC support is a feature that enables error-correcting code (ECC) memory to detect and correct data errors in RAM. ECC support does not check the integrity of a file. Reference: 1 https://www.comparitech.com/net-admin/file-integrity-monitoring-tools/ 2 https://csrc.nist.gov/CSRC/media/Presentations/Firmware-Integrity-Verification-Monitoring-and-Re/images-media/day2_demonstration_330-420.pdf

A hot site is a type of disaster recovery site that has all the equipment and data ready to resume operations as soon as possible after a disaster. A hot site is usually located in a different geographic area than the primary site and has redundant power, cooling, network, and security systems. A hot site is best for the company that wants to recover in the shortest possible time and does not want customer data to egress to non-company equipment. A warm site is a type of disaster recovery site that has some equipment and data ready, but requires some configuration and restoration before resuming operations. A cold site is a type of disaster recovery site that has only basic infrastructure and space available, but requires significant setup and installation before resuming operations. Cloud recovery is a type of disaster recovery service that uses cloud-based resources and platforms to store backups and restore data and applications after a disaster. Reference: https://www.techopedia.com/definition/11172/hot-site https://www.techopedia.com/definition/11173/warm-site https://www.techopedia.com/definition/11174/cold-site https://www.techopedia.com/definition/29836/cloud-recovery

The access control methodology that can be described best as allowing a user the least access based on the jobs the user needs to perform is role-based access control (RBAC). RBAC is an access control method that assigns permissions to users based on their roles or functions within an organization. RBAC provides fine-grained and manageable access control by defining what actions each role can perform and what resources each role can access. RBAC follows the principle of least privilege, which means that users are only granted the minimum level of access required to perform their tasks. RBAC can reduce security risks, simplify administration, and enforce compliance policies.