Disaster Recovery

Question 1

Backup strategies

Answer 1

• Image level
 • Bare metal backup using images
 • Operating system volume snapshots
    or hypervisor snapshots
 • Recover the entire system at once
 • Make an exact copy somewhere else

• File level
 • Copy individual files to a backup
 • May not necessarily store all system files
 • May need to rebuild the OS and then
   perform a file restore

Question 2

Critical application backups

Answer 2

• Application software
• Often distributed across multiple servers
• Application data
• Databases, other data storage
• Location of data
• Local and cloud-based
• All of these are needed when restoring
• They all work together

Question 3

Backup testing

Answer 3

• It’s not enough to perform the backup
• You have to be able to restore
• Disaster recovery testing
• Simulate a disaster situation
• Restore from backup
• Confirm the restoration
• Test the restored application and data
• Perform periodic audits
• Always have a good backup

Question 4

UPS

Answer 4

• Uninterruptible Power Supply
• Short-term backup power
• Blackouts, brownouts, surges
• UPS types
• Offline/Standby UPS
• Line-interactive UPS
• On-line/Double-conversion UPS

• Features
• Auto shutdown, battery capacity, outlets,
phone line suppression

Question 5

Surge suppressor

Answer 5

• Not all power is “clean”
• Self-inflicted power spikes and noise
• Storms, power grid changes

• Spikes are diverted to ground

• Noise filters remove line noise
• Decibel (Db) levels at a specified frequency
• Higher Db is better

Question 6

Account recovery options

Answer 6

• Apps won’t work if users can’t login
• Your Windows Domain will most likely be
the foundation of your recovery efforts

• Consider other authentication requirements
• Multi-factor authentication validation
• Additional authentication databases
• RADIUS, TACACS
• Another good reason for centralized administration
• No local accounts

Question 7

Restoring data from an incremental backup requires

Answer 7

All copies of incremental backups made since the last full backup

Copy of the last full backup

Question 8

What is the function of archive bit?

Answer 8

Indicating whether a file has been modified since the last backup

Question 9

Which type of UPS provides the best power outage protection?

Answer 9

Online

Double-conversion