COMPTIA-SK0-005 Practice Questions

Faulty memory and incorrectly seated memory are likely causes of the random BSOD conditions on

the server. Memory is one of the most common hardware components that can cause BSOD (Blue

Screen of Death) errors on Windows systems. BSOD errors occur when the system encounters a fatal

error that prevents it from continuing to operate normally. Memory errors can be caused by faulty or

incompatible memory modules that have physical defects or manufacturing flaws. Memory errors

can also be caused by incorrectly seated memory modules that are not properly inserted or locked

into the memory slots on the motherboard. This can result in loose or poor connections between the

memory modules and the motherboard.

Comprehensive and Detailed

Blade enclosures are designed to maximize server density by housing multiple blade servers within a

single chassis. This design minimizes the physical footprint compared to traditional rack-mounted

servers. Key benefits include:

Space Efficiency: Multiple servers share power, cooling, and networking within a compact enclosure.

Simplified Management: Centralized management of power, cooling, and networking simplifies

administration.

Scalability: Easily add or replace blade servers without significant reconfiguration.

The bootloader configuration file is used to specify which kernel version and options to use when

booting the system. The first kernel stanza in the file is the default one that is loaded automatically.

By editing this stanza and changing it to point to the last known-good kernel files, the administrator

can boot the system with a working kernel and avoid any compatibility issues with the new kernel

update. Verified Reference: [How To Change The Linux Kernel Version]

Two-person integrity is a security measure that can be implemented to increase security against a

potential insider threat on an air-gapped system. An air-gapped system is a system that is isolated

from any network connection and can only be accessed physically. An insider threat is a malicious

actor who has authorized access to an organization’s system or data and uses it for unauthorized or

harmful purposes. Two-person integrity is a system of storage and handling that requires the

presence of at least two authorized persons, each capable of detecting incorrect or unauthorized

security procedures, for accessing certain sensitive data or material. This way, no single person can

compromise the security or integrity of the data or material without being noticed by another

person. SSO (Single Sign-On) is a feature that allows users to access multiple applications or systems

with one set of credentials, but it does not prevent insider threats. SIEM (Security Information and

Event Management) is a tool that collects and analyzes log data from various sources to detect and

respond to security incidents, but it does not work on air-gapped systems. A Faraday cage is a

structure that blocks electromagnetic signals from entering or leaving, but it does not prevent

physical access or insider threats. MFA (Multi-Factor Authentication) is a method that requires users

to provide two or more pieces of evidence to verify their identity, such as something they know,

something they have, or something they are, but it does not prevent insider threats. Reference:

https://www.howtogeek.com/169080/air-gap-how-to-isolate-a-computer-to-protect-it-fromhackers/ https://www.howtogeek.com/428483/what-is-end-to-end-encryption-and-why-does-it-

matter/ https://www.howtogeek.com/202794/what-is-the-difference-between-127.0.0.1-and0.0.0.0/ https://www.howtogeek.com/443611/how-to-encrypt-your-macs-system-drive-removable-

devices-and-individual-files/

Constant replication is a type of replication in which all files are replicated, all the time. Replication is

a process of copying data from one location to another for backup, recovery, or distribution

purposes. Constant replication is also known as real-time replication or synchronous replication. It

ensures that any changes made to the source data are immediately reflected on the target data

without any delay or lag. Constant replication provides high availability and consistency, but it

requires high bandwidth and low latency. Application consistent replication is a type of replication

that ensures that the replicated data is consistent with the state of the application that uses it. It

involves quiescing or pausing the application before taking a snapshot of the data and resuming the

application after the snapshot is taken. Application consistent replication provides better recovery

point objectives than crash consistent replication, which does not quiesce the application before

taking a snapshot. Synthetic full replication is a type of replication that involves creating a new full

backup by using the previous full backup and related incremental backups. It reduces the backup

window and network bandwidthconsumption by transferring only changed data from the source to

the target. Full replication is a type of replication that involves copying all data from the source to the

target regardless of whether it has changed or not. It provides a complete backup of the data, but it

requires more storage space and network bandwidth than incremental or differential replication.

Reference: https://www.howtogeek.com/199068/how-to-upgrade-your-existing-hard-drive-inunder-an-hour/ https://www.howtogeek.com/202794/what-is-the-difference-between-127.0.0.1-

and-0.0.0.0/https://www.howtogeek.com/443611/how-to-encrypt-your-macs-system-driveremovable-devices-and-individual-files/

The first thing that the technician should do before installing a new server OS on legacy server

hardware is to consult the HCL (Hardware Compatibility List) to ensure everything is supported. The

HCL is a list of hardware devices and components that are tested and certified to work with a specific

OS or software product. The HCL helps to avoid compatibility issues and performance problems that

may arise from using unsupported or incompatible hardware. Migrating the physical server to a

virtual server may be a good option to improve scalability and flexibility, but it requires additional

hardware and software resources and may not be feasible for legacy server hardware. Low-level

formatting the hard drives may be a good practice to erase any old data and prepare the drives for a

new OS installation, but it does not guarantee that the hardware will work with the new OS. Making

sure the case and the fans are free from dust may be a good practice to ensure proper cooling and

prevent overheating, but it does not guarantee that the hardware will work with the new OS.

Reference: https://www.howtogeek.com/190014/virtualization-basics-understanding-techniquesand-fundamentals/ https://www.howtogeek.com/173353/how-to-low-level-format-or-write-zeros-

to-a-hard-drive/https://www.howtogeek.com/303282/how-to-manage-your-pcs-fans-for-optimalairflow-and-cooling/

A tower server is a type of server architecture that is best suited to minimize cost when deploying a

single server to monitor and record the security cameras at a remote site. A tower server is a

standalone server that has a similar form factor and design as a desktop computer. It does not

require any special mounting equipment or rack space and can be placed on or under a desk or table.

A tower server is suitable for small businesses or remote offices that need only one or few servers for

basic tasks such as file sharing, print serving, or security monitoring. A tower server is usually

cheaper and easier to maintain than other types of servers, but it may have lower performance,

scalability, and redundancy features. A virtual server is a type of server architecture that involves

creating and running one or more virtual machines on a physical host using a hypervisor such as

Hyper-V or VMware. A virtual server can reduce hardware costs and improve flexibility and efficiency,

but it requires additional software licenses and management tools. A blade server is a type of server

architecture that involves inserting multiple thin servers called blades into a chassis that provides

power, cooling, network, and management features. A blade server can improve performance,

density, and scalability, but it requires more initial investment and specialized equipment. A rack

mount server is a type of server architecture that involves mounting one or more servers into

standardized frames called racks that provide power, cooling, network, and security features

This is the best action to perform before applying patches to one of the hosts in a high availability

cluster. A high availability cluster is a group of hosts thatact like a single system and provide

continuous uptime. A high availability cluster is often used for load balancing, backup, and failover

purposes. Failover is a process of transferring workloads from one host to another in case of a failure

or maintenance. By failing over all VMs (Virtual Machines) from the host that needs to be patched to

another host in the cluster, the technician can ensure that there is no downtime or data loss during

the patching process. Disabling the heartbeat network is not a good action to perform, as this would

disrupt the communication and synchronization between the hosts in the cluster. Fallback cluster

services is not a valid term, but it may refer to restoring cluster services after a failover, which is not

relevant before applying patches. Setting the cluster to active-active is not a good action to perform,

as this would increase the load on both hosts and reduce redundancy. Reference:

https://www.howtogeek.com/190014/virtualization-basics-understanding-techniques-andfundamentals/https://www.howtogeek.com/428483/what-is-end-to-end-encryption-and-why-does-

it-matter/

Grandfather-father-son (GFS) is a common backup rotation scheme that uses daily, weekly, and

monthly backup media in a first-in, first-out (FIFO) method. The daily backups are rotated on a 3-

months basis using a FIFO system as above. The weekly backups are similarly rotated on a bi-yearly

basis, and the monthly backups are rotated on an annual basis. The oldest backup media in each

cycle are overwritten by the newest ones. This scheme provides multiple versions of backup data at

different intervals, allowing for flexible restoration options. Waterfall is another name for GFS.

Synthetic full is a backup method that combines an initial full backup with subsequent incremental

backups to create a new full backup without transferring all data again. Tower of Hanoi is another

backup rotation scheme that uses an algorithm based on moving disks between three pegs.

Reference:

https://en.wikipedia.org/wiki/Backup_rotation_scheme

A firewall is a network device or software that filters and controls the incoming and outgoing traffic

based on predefined rules. A firewall can block or allow certain types of packets, ports, protocols, or

IP addresses. The output of the ping command shows that the local host is unreachable, which

means that there is no network connectivity between the source and the destination. This could be

caused by a firewall that isblocking the ICMP (Internet Control Message Protocol) packets that ping

uses to test the connectivity.Reference: https://www.comptia.org/training/resources/examobjectives/comptia-server-sk0-005-exam-objectives (Objective 2.2)