CompTIA SK0-005 Practice Test - Questions Answers, Page 39

A link aggregation group (LAG) is a technique that combines multiple physical network interfaces into a single logical interface. This allows for the distribution of traffic across all the interfaces in the group, increasing bandwidth and redundancy. A LAG can use different modes to balance the load, such as address hashing, dynamic, or most recently used algorithm.

References:CompTIA Server+ Study Guide, Chapter 6: Networking, page 239.

An emergency change request is a type of change request that is initiated in response to an urgent situation, such as a system breach, that requires immediate action to restore normal operations or prevent further damage. An emergency change request may bypass some of the normal change management procedures, such as approval, testing, or documentation, in order to expedite the implementation of the change. However, an emergency change request should still follow the basic steps of change management, such as identification, analysis, planning, execution, and evaluation, and should be reviewed and documented after the change is completed.

References:CompTIA Server+ Study Guide, Chapter 11: Change Management, page 443.

Load balancing is a concept that distributes the workload across multiple servers or other resources to optimize performance, availability, and scalability. Load balancing can be implemented at different layers of the network, such as the application layer, the transport layer, or the network layer. Load balancing can use various algorithms or methods to determine how to distribute the traffic, such as round robin, least connections, or weighted distribution.

References:CompTIA Server+ Study Guide, Chapter 6: Networking, page 241.

A rescan on the server's RAID controller is a possible troubleshooting step to detect the existing RAID configurations on the connected storage arrays. A firmware upgrade may cause the RAID controller to lose the RAID metadata or settings, and a rescan may restore them. A rescan is preferable to restoring the default RAID configuration, as the latter may erase the existing data on the arrays. Power cycling the storage arrays or booting the OS into recovery mode may not help if the RAID controller does not recognize the RAID sets.

References:CompTIA Server+ Study Guide, Chapter 7: Storage, page 287.

A DNS entry is a record that maps a domain name to an IP address. If the DNS entry for the new application is incorrect, users will not be able to resolve the domain name to the correct IP address and port number. This will prevent them from accessing the application, even if the firewall rules allow port 8443. To fix this issue, the server administrator should verify and update the DNS entry for the new application.

References:CompTIA Server+ Study Guide, Chapter 6: Networking, page 230.

A cold site is a backup facility with little or no hardware equipment installed. A cold site is the most cost-effective option among the three disaster recovery sites. However, due to the fact that a cold site doesn't have any pre-installed equipment, it takes a lot of time to properly set it up so as to fully resume business operations1.

References = 1: Disaster Recovery Sites Comparison: Which one to Choose? - NAKIVO(https://www.nakivo.com/blog/overview-disaster-recovery-sites/)

TFTP (Trivial File Transfer Protocol) is a simple and lightweight protocol that can be used to transfer files over a network. TFTP is often used to upgrade firmware or software on network devices, such as routers, switches, or servers. TFTP can also be used to install a Type 1 hypervisor, such as VMware ESXi, on multiple hosts simultaneously12.

References = 1: How to Install VMware ESXi Type 1 Hypervisor - MatthewEaton.net(https://mattheweaton.net/posts/how-to-install-vmware-esxi-type-1-hypervisor/) 2: Explore Type 1 Hypervisors - Set Up Virtual Machines Using VirtualBox and vSphere - OpenClassrooms(https://openclassrooms.com/en/courses/7163136-set-up-virtual-machines-using-virtualbox-and-vsphere/7358546-explore-type-1-hypervisors)

An emergency change request is a type of change management activity that is used to address urgent issues that pose a significant risk to the organization, such as a system breach. An emergency change request requires immediate action and approval, and it may bypass some of the normal change management procedures, such as testing, documentation, or stakeholder communication12.

References = 1: Change Management Plans: A Definitive Guide - Indeed(https://www.indeed.com/career-advice/career-development/change-management-activities) 2: The 10 Best Change Management Activities - Connecteam(https://connecteam.com/top-10-change-management-activities/)