Free SK0-005 Exam Braindumps certification guide Q&A [Q28-Q50]

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Free SK0-005 Exam Braindumps certification guide Q&A

SK0-005 Certification Overview Latest SK0-005 PDF Dumps


CompTIA Server+ Exam Certification Details:

Duration90 mins
Sample QuestionsCompTIA Server+ Sample Questions
Exam Price$338 (USD)
Number of Questions90
Exam CodeSK0-005
Exam NameCompTIA Server+
Schedule ExamCompTIA Marketplace
Pearson VUE
Passing Score750 / 900

 

NEW QUESTION 28
A datacenter technician is attempting to troubleshoot a server that keeps crashing. The server runs normally for approximately five minutes, but then it crashes. After restoring the server to operation, the same cycle repeats. The technician confirms none of the configurations have changed, and the load on the server is steady from power-on until the crash. Which of the following will MOST likely resolve the issue?

  • A. Reseating any expansion cards in the server
  • B. Replacing the failing hard drive
  • C. Restoring the server from the latest full backup
  • D. Reinstalling the heat sink with new thermal paste

Answer: D

 

NEW QUESTION 29
A technician is connecting a Linux server to a share on a NAS. Which of the following is the MOST appropriate native protocol to use for this task?

  • A. NFS
  • B. SFTP
  • C. CIFS
  • D. FTP

Answer: C

Explanation:
Reference:
https://www.redhat.com/en/topics/data-storage/network-attached-storage

 

NEW QUESTION 30
An administrator recommends using a tower server in a small remote office. Which of the following should be added to the server to ensure continuous server operation?

  • A. PDU
  • B. Ground strap
  • C. UPS
  • D. Surge protector

Answer: C

 

NEW QUESTION 31
Which of the following must a server administrator do to ensure data on the SAN is not compromised if it is leaked?

  • A. Encrypt the host servers
  • B. Encrypt the data at rest
  • C. Encrypt the data that is leaving the SAN
  • D. Encrypt all the network traffic

Answer: B

 

NEW QUESTION 32
A server administrator wants to run a performance monitor for optimal system utilization. Which of the following metrics can the administrator use for monitoring? (Choose two.)

  • A. CPU
  • B. Application
  • C. Memory
  • D. Page file
  • E. Services
  • F. Heartbeat

Answer: A,C

 

NEW QUESTION 33
Which of the following documents would be useful when trying to restore IT infrastructure operations after a non-planned interruption?

  • A. Service-level agreement
  • B. Disaster recovery plan
  • C. Business impact analysis
  • D. Business continuity plan

Answer: C

 

NEW QUESTION 34
A technician is configuring a server that requires secure remote access. Which of the following ports should the technician use?

  • A. 0
  • B. 1
  • C. 2
  • D. 3

Answer: A

Explanation:
Reference:
https://docs.microsoft.com/en-us/windows-server/remote/remote-access/ras/manage-remote-clients/install/ step-1-configure-the-remote-access-infrastructure

 

NEW QUESTION 35
Which of the following DR testing scenarios is described as verbally walking through each step of the DR plan in the context of a meeting?

  • A. Tabletop
  • B. Simulated failover
  • C. Asynchronous
  • D. Live failover

Answer: D

 

NEW QUESTION 36
A server administrator needs to check remotely for unnecessary running services across 12 servers. Which of the following tools should the administrator use?

  • A. A sniffer
  • B. Anti-malware
  • C. A port scanner
  • D. DLP

Answer: C

 

NEW QUESTION 37
Which of the following describes the installation of an OS contained entirely within another OS installation?

  • A. Host
  • B. Guest
  • C. Hypervisor
  • D. Bridge

Answer: C

 

NEW QUESTION 38
A server technician has been asked to upload a few files from the internal web server to the internal FTP server. The technician logs in to the web server using PuTTY, but the connection to the FTP server fails. However, the FTP connection from the technician's workstation is successful. To troubleshoot the issue, the technician executes the following command on both the web server and the workstation:
ping ftp.acme.local
The IP address in the command output is different on each machine. Which of the following is the MOST likely reason for the connection failure?

  • A. A misconfigured hosts.allow file
  • B. A misconfigured firewall
  • C. A misconfigured hosts file
  • D. A misconfigured hosts.deny file

Answer: A

 

NEW QUESTION 39
Which of the following is a method that is used to prevent motor vehicles from getting too close to building entrances and exits?

  • A. Security guards
  • B. Reflective glass
  • C. Bollards
  • D. Security cameras

Answer: C

 

NEW QUESTION 40
Which of the following will correctly map a script to a home directory for a user based on username?

  • A. \\server\$username$
  • B. \\server\FirstInitialLastName
  • C. \\server\%username%
  • D. \\server\users$\username

Answer: C

Explanation:
Reference:
https://social.technet.microsoft.com/Forums/windows/en-US/07cfcb73-796d-48aa-96a9-08280a1ef25a/ mapping-home-directory-with-username-variable?forum=w7itprogeneral

 

NEW QUESTION 41
A server administrator has noticed that the storage utilization on a file server is growing faster than planned. The administrator wants to ensure that, in the future, there is a more direct relationship between the number of users using the server and the amount of space that might be used. Which of the following would BEST enable this correlation?

  • A. Disk quotas
  • B. Deduplication
  • C. Partitioning
  • D. Compression

Answer: A

 

NEW QUESTION 42
An administrator needs three distinct security zones in a company's network. Which of the following is the administrator MOST likely to implement?

  • A. A Layer 3 firewall
  • B. Host-based firewalls
  • C. A circuit-based firewall
  • D. A web application firewall

Answer: A

 

NEW QUESTION 43
A server that recently received hardware upgrades has begun to experience random BSOD conditions. Which of the following are likely causes of the issue? (Choose two.)

  • A. Incompatible disk speed
  • B. Faulty memory
  • C. Uninitialized disk
  • D. Overallocated memory
  • E. Incorrectly seated memory
  • F. Data partition error

Answer: B,E

 

NEW QUESTION 44
A DHCP server is configured to issue IP addresses. Client machines have successfully obtained an IP address. However, when testing, users are unable to browse the Internet. Which of the following might be the MOST likely cause?

  • A. The DHCP server is unable to communicate with the DNS server.
  • B. The DHCP server ran out of IP addresses.
  • C. DNS configuration on the DHCP server is missing.
  • D. The client machines are not members of the domain.

Answer: C

 

NEW QUESTION 45
A technician has been asked to check on a SAN. Upon arrival, the technician notices the red LED indicator shows a disk has failed. Which of the following should the technician do NEXT, given the disk is hot swappable?

  • A. Stop all connections to the volume
  • B. Stop sharing the volume
  • C. Shut down the SAN
  • D. Replace the disk

Answer: D

 

NEW QUESTION 46
After configuring IP networking on a newly commissioned server, a server administrator installs a straight- through network cable from the patch panel to the switch. The administrator then returns to the server to test network connectivity using the ping command. The partial output of the ping and ipconfig commands are displayed below:

The administrator returns to the switch and notices an amber link light on the port where the server is connected. Which of the following is the MOST likely reason for the lack of network connectivity?

  • A. An improper VLAN configuration
  • B. A misconfigured DHCP server
  • C. A misconfigured NIC on the server
  • D. Network port security

Answer: C

 

NEW QUESTION 47
Network connectivity to a server was lost when it was pulled from the rack during maintenance. Which of the following should the server administrator use to prevent this situation in the future?

  • A. A wireless connection
  • B. Cable management
  • C. A power distribution unit
  • D. Rail kits

Answer: B

 

NEW QUESTION 48
A technician needs to set up a server backup method for some systems. The company's management team wants to have quick restores but minimize the amount of backup media required. Which of the following are the BEST backup methods to use to support the management's priorities? (Choose two.)

  • A. Archive
  • B. Open file
  • C. Synthetic full
  • D. Incremental
  • E. Differential
  • F. Full

Answer: C,E

 

NEW QUESTION 49
A technician is unable to access a server's package repository internally or externally. Which of the following are the MOST likely reasons? (Choose two.)

  • A. The external firewall is blocking access
  • B. The default gateway is incorrect
  • C. The server has an architecture mismatch
  • D. The technician does not have sufficient privileges
  • E. The local system log file is full
  • F. The system time is not synchronized

Answer: C,F

 

NEW QUESTION 50
......


CompTIA SK0-005 Exam Syllabus Topics:

TopicDetails

Server Hardware Installation and Management - 18%

Given a scenario, install physical hardware.- Racking
  1. Enclosure sizes
  2. Unit sizes
    - 1U, 2U, 3U, etc.
  3. Rack layout
    - Cooling management
    - Safety
    1. Proper lifting techniques
    2. Rack balancing
    3. Floor load limitations
    - Power distribution unit (PDU)
    - Keyboard-video-mouse (KVM) placement
    - Rail kits

- Power cabling

  1. Redundant power
    - Uninterruptible power supply (UPS)
    - Separate circuits
    - Separate providers
  2. Power connector types
  3. Cable management

- Network cabling

  1. Redundant networking
  2. Twisted pair
  3. Fiber
    - SC
    - LC
    - Single mode
    - Multimode
  4. Gigabit
  5. 10 GigE
  6. Small form factor pluggable (SFP)
  7. SFP+
  8. Quad small form factor pluggable (QSFP)
  9. Cable management

- Server chassis types

  1. Tower
  2. Rack mount
  3. Blade enclosure

- Server components

  1. Hardware compatibility list (HCL)
  2. Central processing unit (CPU)
  3. Graphics processing unit (GPU)
  4. Memory
  5. Bus types
  6. Interface types
  7. Expansion cards
Given a scenario, deploy and manage storage.- RAID levels and types
  1. 0
  2. 1
  3. 5
  4. 6
  5. 10
  6. Just a bunch of disks (JBOD)
  7. Hardware vs. software

- Capacity planning
- Hard drive media types

  1. Solid state drive (SSD)
    - Wear factors
    1. Read intensive
    2. Write intensive
  2. Hard disk drive (HDD)
    - Rotations per minute (RPM)
    1. 15,000
    2. 10,000
    3. 7,200
  3. Hybrid

- Interface types

  1. Serial attached SCSI (SAS)
  2. Serial ATA (SATA)
  3. Peripheral component interconnect (PCI)
  4. External serial advanced technology attachment (eSATA)
  5. Universal serial bus (USB)
  6. Secure digital (SD)

- Shared storage

  1. Network attached storage (NAS)
    - Network file system (NFS)
    - Common Internet file system (CIFS)
  2. Storage area network (SAN)
    - Internet small computer systems interface (iSCSI)
    - Fibre Channel
    - Fibre Channel over Ethernet (FCoE)
Given a scenario, perform server hardware maintenance.- Out-of-band management
  1. Remote drive access
  2. Remote console access
  3. Remote power on/off
  4. Internet protocol keyboard-video-mouse (IP KVM)

- Local hardware administration

  1. Keyboard-video-mouse (KVM)
  2. Crash cart
  3. Virtual administration console
  4. Serial connectivity
  5. Console connections

- Components

  1. Firmware upgrades

- Drives
- Hot-swappable hardware

  1. Drives
  2. Cages
  3. Cards
  4. Power supplies
  5. Fans

- Basic input/output system (BIOS)/Unified Extensible Firmware Interface (UEFI)

Server Administration - 30%

Given a scenario, install server operating systems.- Minimum operating system (OS) requirements
- Hardware compatibility list (HCL)
- Installations
  1. Graphical user interface (GUI)
  2. Core
  3. Bare metal
  4. Virtualized
  5. Remote
  6. Slip streamed/unattended
    - Scripted installations
    - Additional drivers
    - Additional applications and utilities
    - Patches
  7. Media installation type
    - Network
    - Optical
    - Universal serial bus (USB)
    - Embedded
  8. Imaging
    - Cloning
    1. Virtual machine (VM) cloning
    2. Physical clones
    3. Template deployment
    4. Physical to virtual (P2V)

- Partition and volume types

  1. Global partition table (GPT) vs. master boot record (MBR)
  2. Dynamic disk
  3. Logical volume management (LVM)

- File system types

  1. ext4
  2. New technology file system (NTFS)
  3. VMware file system (VMFS)
  4. Resilient file system (ReFS)
  5. Z file system (ZFS)
Given a scenario, configure servers to use network infrastructure services.- IP configuration
- Virtual local area network (VLAN)
- Default gateways
- Name resolution
  1. Domain name service (DNS)
  2. Fully qualified domain name (FQDN)
  3. Hosts file

- Addressing protocols

  1. IPv4
    - Request for comments (RFC) 1918 address spaces
  2. IPv6

- Firewall

  1. Ports

- Static vs. dynamic

  1. Dynamic host configuration protocol (DHCP)

- MAC addresses

Given a scenario, configure and maintain server functions and features.- Server roles requirements
  1. Print
  2. Database
  3. File
  4. Web
  5. Application
  6. Messaging
  7. Baselining
    - Documentation
    - Performance metrics

- Directory connectivity
- Storage management

  1. Formatting
  2. Connectivity
  3. Provisioning
  4. Partitioning
  5. Page/swap/scratch location and size
  6. Disk quotas
  7. Compression
  8. Deduplication

- Monitoring

  1. Uptime
  2. Thresholds
  3. Performance
    - Memory
    - Disk
    1. Input output operations per second (IOPS)
    2. Capacity vs. utilization
    - Network
    - Central processing unit (CPU)
  4. Event logs
    - Configuration
    - Shipping
    - Alerting
    - Reporting
    - Retention
    - Rotation

- Data migration and transfer

  1. Infiltration
  2. Exfiltration
  3. Disparate OS data transfer
    - Robocopy
    - File transfer
    - Fast copy
    - Secure copy protocol (SCP)

- Administrative interfaces

  1. Console
  2. Remote desktop
  3. Secure shell (SSH)
  4. Web interface
Explain the key concepts of high availability for servers.- Clustering
  1. Active-active
  2. Active-passive
  3. Failover
  4. Failback
  5. Proper patching procedures
  6. Heartbeat

- Fault tolerance

  1. Server-level redundancy vs. component redundancy

- Redundant server network infrastructure

  1. Load balancing
    - Software vs. hardware
    - Round robin
    - Most recently used (MRU)
  2. Network interface card (NIC) teaming and redundancy
    - Failover
    - Link aggregation
Summarize the purpose and operation of virtualization.- Host vs. guest
- Virtual networking
  1. Direct access (bridged)
  2. Network address translation (NAT)
  3. vNICs
  4. Virtual switches

- Resource allocation and provisioning

  1. CPU
  2. Memory
  3. Disk
  4. NIC
  5. Overprovisioning
  6. Scalability

- Management interfaces for virtual machines
- Cloud models

  1. Public
  2. Private
  3. Hybrid
Summarize scripting basics for server administration.- Script types
  1. Bash
  2. Batch
  3. PowerShell
  4. Virtual basic script (VBS)

- Environment variables
- Comment syntax
- Basic script constructs

  1. Loops
  2. Variables
  3. Conditionals
  4. Comparators

- Basic data types

  1. Integers
  2. Strings
  3. Arrays

- Common server administration scripting tasks

  1. Startup
  2. Shut down
  3. Service
  4. Login
  5. Account creation
  6. Bootstrap
Explain the importance of asset management and documentation.- Asset management
  1. Labeling
  2. Warranty
  3. Leased vs. owned devices
  4. Life-cycle management
    - Procurement
    - Usage
    - End of life
    - Disposal/recycling
  5. Inventory
    - Make
    - Model
    - Serial number
    - Asset tag

- Documentation management

  1. Updates
  2. Service manuals
  3. Architecture diagrams
  4. Infrastructure diagrams
  5. Workflow diagrams
  6. Recovery processes
  7. Baselines
  8. Change management
  9. Server configurations
  10. Company policies and procedures
    - Business impact analysis (BIA)
    - Mean time between failure (MTBF)
    - Mean time to recover (MTTR)
    - Recovery point objective (RPO)
    - Recovery time objective (RTO)
    - Service level agreement (SLA)
    - Uptime requirements

- Document availability
- Secure storage of sensitive documentation

Explain licensing concepts.- Models
  1. Per-instance
  2. Per-concurrent user
  3. Per-server
  4. Per-socket
  5. Per-core
  6. Site-based
  7. Physical vs. virtual
  8. Node-locked
  9. Signatures

- Open source
- Subscription
- License vs. maintenance and support
- Volume licensing
- License count validation

  1. True up

- Version compatibility

  1. Backward compatible
  2. Forward compatible

Security and Disaster Recovery - 24%

Summarize data security concepts.- Encryption paradigms
  1. Data at rest
  2. Data in transit

- Retention policies
- Data storage

  1. Physical location storage
  2. Off-site vs. on-site

- UEFI/BIOS passwords
- Bootloader passwords
- Business impact

  1. Data value prioritization
  2. Life-cycle management
  3. Cost of security vs. risk and/or replacement
Summarize physical security concepts.- Physical access controls
  1. Bollards
  2. Architectural reinforcements
    - Signal blocking
    - Reflective glass
    - Datacenter camouflage
  3. Fencing
  4. Security guards
  5. Security cameras
  6. Locks
    - Biometric
    - Radio frequency identification (RFID)
    - Card readers
    - Mantraps
    - Safes

- Environmental controls

  1. Fire suppression
  2. Heating, ventilation, and cooling (HVAC)
  3. Sensors
Explain important concepts pertaining to identity and access management for server administration.- User accounts
- User groups
- Password policies
  1. Length
  2. Lockout
  3. Enforcement

- Permissions and access controls

  1. Role-based
  2. Rule-based
  3. Scope based
  4. Segregation of duties
  5. Delegation

- Auditing

  1. User activity
  2. Logins
  3. Group memberships
  4. Deletions

- Multifactor authentication (MFA)

  1. Something you know
  2. Something you have
  3. Something you are

- Single sign-on (SSO)

Explain data security risks and mitigation strategies.- Security risks
  1. Hardware failure
  2. Malware
  3. Data corruption
  4. Insider threats
  5. Theft
    - Data loss prevention (DLP)
    - Unwanted duplication
    - Unwanted publication
  6. Unwanted access methods
    - Backdoor
    - Social engineering
  7. Breaches
    - Identification
    - Disclosure

- Mitigation strategies

  1. Data monitoring
  2. Log analysis
    - Security information and event management (SIEM)
  3. Two-person integrity
    - Split encryption keys tokens
    - Separation of roles
  4. Regulatory constraints
    - Governmental
    - Individually privileged information
    1. Personally identifiable information (PII)
    2. Payment Card Industry DataSecurity Standard (PCI DSS)
  5. Legal considerations
    - Data retention
    - Subpoenas
Given a scenario, apply server hardening methods.- OS hardening
  1. Disable unused services
  2. Close unneeded ports
  3. Install only required software
  4. Apply driver updates
  5. Apply OS updates
  6. Firewall configuration

- Application hardening

  1. Install latest patches
  2. Disable unneeded services, roles, or features

- Host security

  1. Antivirus
  2. Anti-malware
  3. Host intrusion detection system (HIDS)/Host intrusion prevention system (HIPS)

- Hardware hardening

  1. Disable unneeded hardware
  2. Disable unneeded physical ports, devices, or functions
  3. Set BIOS password
  4. Set boot order

- Patching

  1. Testing
  2. Deployment
  3. Change management
Summarize proper server decommissioning concepts.- Proper removal procedures
  1. Company policies
  2. Verify non-utilization
  3. Documentation
    - Asset management
    - Change management

- Media destruction

  1. Disk wiping
  2. Physical
    - Degaussing
    - Shredding
    - Crushing
    - Incineration
  3. Purposes for media destruction

- Media retention requirements
- Cable remediation

  1. Power
  2. Networking

- Electronics recycling

  1. Internal vs. external
  2. Repurposing
Explain the importance of backups and restores.- Backup methods
  1. Full
  2. Synthetic full
  3. Incremental
  4. Differential
  5. Archive
  6. Open file
  7. Snapshot

- Backup frequency
- Media rotation
- Backup media types

  1. Tape
  2. Cloud
  3. Disk
  4. Print

- File-level vs. system-state backup
- Restore methods

  1. Overwrite
  2. Side by side
  3. Alternate location path

- Backup validation

  1. Media integrity
  2. Equipment
  3. Regular testing intervals

- Media inventory before restoration

Explain the importance of disaster recovery.- Site types
  1. Hot site
  2. Cold site
  3. Warm site
  4. Cloud
  5. Separate geographic locations

- Replication

  1. Constant
  2. Background
  3. Synchronous vs. asynchronous
  4. Application consistent
  5. File locking
  6. Mirroring
  7. Bidirectional

- Testing

  1. Tabletops
  2. Live failover
  3. Simulated failover
  4. Production vs. non-production

Troubleshooting - 28%

Explain the troubleshooting theory and methodology.- Identify the problem and determine the scope.
  1. Question users/stakeholders and identify changes to the server/environment.
  2. Collect additional documentation/logs.
  3. If possible, replicate the problem as appropriate.
  4. If possible, perform backups before making changes.
  5. Escalate, if necessary.

- Establish a theory of probable cause (question the obvious).

  1. Determine whether there is a common element or symptom causing multiple problems.

- Test the theory to determine the cause.

  1. Once the theory is confirmed, determine the next steps to resolve the problem.
  2. If the theory is not confirmed, establish a new theory.

- Establish a plan of action to resolve the problem.

  1. Notify impacted users.

- Implement the solution or escalate.

  1. Make one change at a time and test/confirm the change has resolved the problem.
  2. If the problem is not resolved, reverse the change, if appropriate, and implement a new change.

- Verify full system functionality and, if applicable, implement preventive measures.
- Perform a root cause analysis.
- Document findings, actions, and outcomes throughout the process.

Given a scenario, troubleshoot common hardware failures.- Common problems
  1. Predictive failures
  2. Memory errors and failures
    - System crash
    1. Blue screen
    2. Purple screen
    3. Memory dump
    - Utilization
    - Power-on self-test (POST) errors
    - Random lockups
    - Kernel panic
  3. Complementary metal-oxide-semiconductor (CMOS) battery failure
  4. System lockups
  5. Random crashes
  6. Fault and device indication
    - Visual indicators
  7. Light-emitting diode (LED)
  8. Liquid crystal display (LCD) panel readouts
    - Auditory or olfactory cues
    - POST codes
  9. Misallocated virtual resources

- Causes of common problems

  1. Technical
    - Power supply fault
    - Malfunctioning fans
    - Improperly seated heat sink
    - Improperly seated cards
    - Incompatibility of components
    - Cooling failures
    - Backplane failure
    - Firmware incompatibility
    - CPU or GPU overheating
  2. Environmental
    - Dust
    - Humidity
    - Temperature

- Tools and techniques

  1. Event logs
  2. Firmware upgrades or downgrades
  3. Hardware diagnostics
  4. Compressed air
  5. Electrostatic discharge (ESD) equipment
  6. Reseating or replacing components and/or cables
Given a scenario, troubleshoot storage problems.- Common problems
  1. Boot errors
  2. Sector block errors
  3. Cache battery failure
  4. Read/write errors
  5. Failed drives
  6. Page/swap/scratch file or partition
  7. Partition errors
  8. Slow file access
  9. OS not found
  10. Unsuccessful backup
  11. Unable to mount the device
  12. Drive not available
  13. Cannot access logical drive
  14. Data corruption
  15. Slow I/O performance
  16. Restore failure
  17. Cache failure
  18. Multiple drive failure

- Causes of common problems

  1. Disk space utilization
    - Insufficient disk space
  2. Misconfigured RAID
  3. Media failure
  4. Drive failure
  5. Controller failure
  6. Hot bus adapter (HBA) failure
  7. Loose connectors
  8. Cable problems
  9. Misconfiguration
  10. Corrupt boot sector
  11. Corrupt filesystem table
  12. Array rebuild
  13. Improper disk partition
  14. Bad sectors
  15. Cache battery failure
  16. Cache turned off
  17. Insufficient space
  18. Improper RAID configuration
  19. Mismatched drives
  20. Backplane failure

- Tools and techniques

  1. Partitioning tools
  2. Disk management
  3. RAID and array management
  4. System logs
  5. Disk mounting commands
    - net use
    - mount
  6. Monitoring tools
  7. Visual inspections
  8. Auditory inspections
Given a scenario, troubleshoot common OS and software problems.- Common problems
  1. Unable to log on
  2. Unable to access resources
  3. Unable to access files
  4. System file corruption
  5. End of life/end of support
  6. Slow performance
  7. Cannot write to system logs
  8. Service failures
  9. System or application hanging
  10. Freezing
  11. Patch update failure

- Causes of common problems

  1. Incompatible drivers/modules
  2. Improperly applied patches
  3. Unstable drivers or software
  4. Server not joined to domain
  5. Clock skew
  6. Memory leaks
  7. Buffer overrun
  8. Incompatibility
    Insecure dependencies
    Version management
    Architecture
  9. Update failures
  10. Missing updates
  11. Missing dependencies
  12. Downstream failures due to updates
  13. Inappropriate application-level permissions
  14. Improper CPU affinity and priority

- OS and software tools and techniques

  1. Patching
    - Upgrades
    - Downgrades
  2. Package management
  3. Recovery
    - Boot options
    1. Safe mode
    2. Single user mode
    - Reload OS
    - Snapshots
  4. Proper privilege escalations
    - runas/Run As
    - sudo
    - su
  5. Scheduled reboots
  6. Software firewalls
    - Adding or removing ports
    - Zones
  7. Clocks
    - Network time protocol (NTP)
    - System time
  8. Services and processes
    - Starting
    - Stopping
    - Status identification
    - Dependencies
  9. Configuration management
    - System center configuration manager (SCCM)
    - Puppet/Chef/Ansible
    - Group Policy Object (GPO)
  10. Hardware compatibility list (HCL)
Given a scenario, troubleshoot network connectivity issues.- Common problems
  1. Lack of Internet connectivity
  2. Resource unavailable
  3. Receiving incorrect DHCP information
  4. Non-functional or unreachable
  5. Destination host unreachable
  6. Unknown host
  7. Unable to reach remote subnets
  8. Failure of service provider
  9. Cannot reach server by hostname/fully qualified domain name (FQDN)

- Causes of common problems

  1. Improper IP configuration
  2. IPv4 vs. IPv6 misconfigurations
  3. Improper VLAN configuration
  4. Network port security
  5. Component failure
  6. Incorrect OS route tables
  7. Bad cables
  8. Firewall (misconfiguration, hardware failure, software failure)
  9. Misconfigured NIC
  10. DNS and/or DHCP failure
  11. DHCP server misconfigured
  12. Misconfigured hosts file

- Tools and techniques

  1. Check link lights
  2. Confirm power supply
  3. Verify cable integrity
  4. Check appropriate cable selection
  5. Commands
    - ipconfig
    - ip addr
    - ping
    - tracert
    - traceroute
    - nslookup
    - netstat
    - dig
    - telnet
    - nc
    - nbtstat
    - route
Given a scenario, troubleshoot security problems.- Common concerns
  1. File integrity
  2. Improper privilege escalation
    - Excessive access
  3. Applications will not load
  4. Cannot access network fileshares
  5. Unable to open files

- Causes of common problems

  1. Open ports
  2. Services
    - Active
    - Inactive
    - Orphan/zombie
  3. Intrusion detection configurations
  4. Anti-malware configurations
  5. Improperly configured local/group policies

- Improperly configured firewall rules

  1. Misconfigured permissions
  2. Virus infection
  3. Malware
  4. Rogue processes/services
  5. Data loss prevention (DLP)

- Security tools

  1. Port scanners
  2. Sniffers
  3. Telnet clients
  4. Anti-malware
  5. Antivirus
  6. File integrity
    - Checksums
    - Monitoring
    - Detection
    - Enforcement
  7. User access controls
    - SELinux
    - User account control (UAC)

 

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