General
describe a disk's composition
hint: platter, surface, track, sector
One disk contains multiple platters
One platter contains 2 surface
One surface contains multiple tracks
One track contains multiple sectors
What is RAID-0 and RAID-1
RAID-0: Uses 2 or more disks in an array to improve the performance
RAID-1: Mirror data to 2 disks
What is heartbeat signal in failover cluster
True/False:
The BC/DR toolkit never contains a current, updated copy of the BC/DR plan since that's redundant.
False
The course number of Cloud Security in Fall 2023 for Undergraduate Students(exclude the prefix)
4960
What is disk's block
A. Smallest unit of data storage
B. Blocks that resides on the disk's tracks
C. Smallest unit of data block that is transferred between main memory and disk
D. The gap between sectors
A. smallest unit of data storage
what is checksum value and how can it be used
Based on the data in disk blocks, generate checksum value as parity. If one disk is broken, we can use parity to recover
What is HA failover cluster and what is CA failover cluster
HA: Guarantee 99.999% availability
CA: Guarantee 100% availability
Name the BC/DR Testing method(out of 3 mentioned) that does not involve the entire organization
Tabletop Testing
The Game Franchise for the Tournament opening theme
Final Fantasy
What is Full/Differential Backup Strategy and how to recover the data
Full backup first
On a regular basis, backup all of the data that has changed since the last full backup
Recovery
Recover last full backup data
Recover the most recent backup based on the last full backup
what is the difference between RAID-4 and RAID-5
RAID-4: uses three or more drives in an array and uses striping with parity
RAID-5: Evenly Distribute parity blocks
How Round-Robin Algorithm works in load balancing cluster
First connection to server A; second to server B; …
Explain why it is reasonable to measure RPO in time
It is normal to measure "X hours of data" for most business/organizations.
Topics chosen for this year's tournament
(not Episode Number)
Fault Tolerance & Disaster Recovery
What is Full/Incremental Backup Strategy and how to recover the data
Full backup first
On a regular basis, back up only the data that has changed since the last backup
Recovery
Recover last full backup data
Iteratively recover each regular basis’ backup
What is RAID-6 and describe a way to generate 2 block's parity
first block:
the number of 1 in each block is odd -> 1
the number of 1 in each block is even -> 0
second block:
copy first block's checksum value
What is affinity
Affinity refers to a rule a user would set up to establish a relationship between two or more roles to keep them together
Describe the importance of Disaster Criteria for BC/DR planning
Differentiate between normal operations and emergency operations
What hashtag was used in the "callahan's personal cloud successfully hacked" timeline
#callahanhacked
Describe Fault Tolerance's 1 definition, 2 models, and 3 components
* Fault tolerance refers to the ability of a system to continue functioning in the face of faults or failures.
* Normal Functioning & Graceful Degradation
* Diversity, Redundancy, and Replication
RAID-6: recover broken block's data
+-----|-----|-----|-----|-----+
|p2:1| 0 | 0 | 1 |p1:0|
| 0 |p2:1|p2:0|p1:0| 1 |
| 0 | 0 |p1:0| 1 | 1 |
| | | | | |
|p1:1| 1 | 1 | 0 |p2:0|
+-----|-----|-----|-----|-----+
|p2:1| 0 | 0 | 1 |p1:0|
| 0 |p2:1|p2:0|p1:0| 1 |
| 0 | 0 |p1:0| 1 | 1 |
| 1 |p1:1| 1 |p2:0| 0 |
|p1:1| 1 | 1 | 0 |p2:0|
how Source Address Affinity Algorithm works in load balancing cluster
Record customer’s IP and source IP address affinity to ensure that the connection is redirected to the same server
List all 3 forementioned use cases of Cloud backups
(NO partial credit)
Private Architecture x Cloud Service as Backup
Cloud Operations x Cloud Provider/Vendor as Backup
Cloud Operations x 3rd Party Cloud Provider as Backup
How many disks were present in the example diagram for RAID-5(Evenly Distribute parity blocks)
4(Disk 0 ~ Disk 3)