2.5 Given a scenario, implement cybersecurity resilience. Flashcards
Redundancy
Strategy on keeping systems operational during a failures.
Geographical Dispersal
Data centers in a different place to avoid natural disasters.
Multipath I/O
Multipath input/Output
having more than one way to direct traffic if a switch goes down.
RAID
Data that is spread through out several other disk. Used for back ups.
Load Balancers
directs loads(data) to a specific server when one server is down.
helps moves data on a network so one server is not over whelmed.
NIC teaming
Multiple NICs(bond) on a server. Helps provide redundancy to by switching to another NIC when it is down.
UPS
Uninterruptible Power Supply
Temporary power supply for when a system is down. Needs to be replaced by a sufficient power source later though.
Generator
Power supply that runs off gas or diesel. Is used when there is no normal source of power.
Dual Supply
Having to 2 power supplies that can handle the same load.
PDU
Power Distribution Units
monitored and controlled power for server racks.
SAN
Storage Area Network
A high-performance storage facility where data is stored separate from the computer.
Multiple storage
VM Replication
VM can act as a back up by copying files\data on all VMs.
If one VM goes down you can just pull data from the other VM
On Premises Redundancy
local back up storage service.
fast, costly, more secure
Cloud Redundancy
Data back ups located in the cloud.
Slow, cheap, security concern.
Full Back Up
Back ups everything within the computer\device
Incremental Back up
Backs up only the files that where changed since the last full or incremental back up
Differential Back Up
Back ups only files from the last full back up
Tape (Back Up)
A magnetic tape that has is used for storage
NAS
Network Attached Storage
a single storage machine that is connected to the network
Image (Back Up)
Captures the entire system of the data.
Making a duplicate
Offline Back up
Local, fast, secure
Online Back Up
Over the network, Encrypted, can be slow, back up anywhere
Non-persistence
System items that change and are not permanent
Snap Shot
Capture current config settings.
Revert to known state
Go back to the original config settings
High Availability
Immediate access to a system when your system goes down
Elasticity
Scaling out
Scalability
Scale up
Order of Restoration
Plan of what needs to be restored first
Diversity
having different systems so that if a attack happens to a specific system. Your entire system wont be down
Need different:
Vendors, Technology, Crypto
Crypto (diversity)
having differnt certificates so that if one is compromised it can be changed
