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Sec+ -> 2.0 Architecture and Design (21%) > 2.5 - Given a scenario, implement cybersecurity resilience. > Flashcards

2.5 - Given a scenario, implement cybersecurity resilience. Flashcards

1
Q

Redundancy

A
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2
Q

Geographic dispersal

A
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3
Q

Redundant array of independent (or
inexpensive) disks (RAID) levels

A

-ensure data isn’t corrupted or lost (parity)
-ensures that 1+ disk failures can be handled by an array without losing data
-used multiple disks with data Striped or Mirrored
->striped = spread across disks
->mirrored = completely copied

-combine RAID methods to increase redundancy
->RAID 0+1, RAID 1+0, RAID 5+1, ETC

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4
Q

Multipath

A
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5
Q

Load balancers (Network)

A

-

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6
Q

Network interface card (NIC) teaming

A
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7
Q

UPS

A

Uninterruptible power supply

-SHORT TERM backup power
-EX: blackouts, brownouts, surges

-features;
->auto shutdown
->battery capacity
->outlets
->phone line suppression

-UPS types;
->Offline/Standby UPS
–>Line-interactive UPS
–>On-line/Double-conversion UPS

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8
Q

Generator

A
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9
Q

Dual power supply

A

-provide pwr 4 longer outages
-ensure pwr supply failure won’t disable a server

-Redundancy
–>Internal server pwr supplies
–>External pwr circuits

-Each pwr supply can handle 100% of the load (Would normally run at 50% of the load)

-Hot-swappable
–>Replace a faulty pwr supply without powering down

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10
Q

PDUs (Managed power distribution units)

A

-Provide multiple pwr outlets
–>Usually in a rack

-Often include monitoring and ctrl
->Manage pwr capacity
->Enable/disable individual outlets

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11
Q

Storage area network

A
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12
Q

VM

A
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13
Q

On-premises vs. cloud

A
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14
Q

Full (Backup types)

A
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15
Q

Incremental (Backup types)

A
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16
Q

Snapshot (Backup types)

A
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17
Q

Differential (Backup types)

A
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18
Q

Tape (Backup types)

A
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19
Q

Disk (Backup types)

A
20
Q

Copy (Backup types)

A
21
Q

Network-attached storage (NAS) (Backup types)

A
22
Q

Storage area network (Backup types)

A
23
Q

Cloud (Backup types)

A
24
Q

Image (Backup types)

A
25
Q

Online vs. offline (Backup types)

A
26
Q

Offsite storage (Backup types)

A
27
Q

Distance considerations (Backup types)

A
28
Q

Non-persistence

A
29
Q

Revert to known state (Non-persistence)

A
30
Q

Last known-good configuration (Non-persistence)

A
31
Q

Live boot media (Non-persistence)

A
32
Q

Scalability (High availability)

A
33
Q

Restoration order

A
34
Q

Technologies (Diversity)

A
35
Q

Vendors (Diversity)

A
36
Q

Crypto (Diversity)

A
37
Q

Controls (Diversity)

A
38
Q

Raid 0

A

-striping without parity
-data spread across all devices in the array

Advantages
-high performance
-better I/O performance
-all capacity used

Disadvantages
-no fault tolerance
-all data is lost if a drive is lost

39
Q

Striped

A

-spread across disks

40
Q

Mirrored

A

-completely copied

41
Q

RAID 1

A

-mirroring
-all data copied exactly to another drive/s

Advantages
-duplicates data 4 fault tolerance
-high speeds from multiple drives
-data available if a drive fails

Disadvantages
-requires twice the disk space

42
Q

RAID 5

A

-striping with parity
-data striped (spread across disks)
-one drive used for parity (check sum) of the data
-parity spread across drives and data

Advantages
-fault tolerant
-only requires an additional disk 4 redundancy
-data reads fast
-data writes a little slower
-drive failures can be rebuilt as long as only one drive fails

Disadvantages
-only tolerates a single drive failure at a time
-rebuilding arrays after a drive loss can be slow + impact performance

43
Q

RAID 6

A

-striping with double parity
-like RAID 5 BUT additional parity stored on another drive

Advantages
-like RAID5, BUT allows more than one drive to fail at a time

Disadvantages
-slower write performance than RAID 5
-rebuilding arrays after drive loss can be slow + impact performance

44
Q

RAID 10

A

-mirroring and striping
-data striped across 2+ drive, then mirrored to same # of drives
-sometimes written as 1+0

Advantages
-combines advantages disadvantages of RAID 0 and RAID 1

Disadvantages
-combines advantages disadvantages of RAID 0 and RAID 1

45
Q

Without parity

A

-data does not have redundancy or fault tolerance

Sec+ -> 2.0 Architecture and Design (21%) (8 decks)

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