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AWS Cloud Practitioner (CLF-C02) > Elastic Load Balancing & Auto Scaling Groups > Flashcards

Elastic Load Balancing & Auto Scaling Groups Flashcards

1
Q

Vertical scalability

A

Increase size of the instance

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2
Q

Vertical scalability is common for…

A

non-distributed systems, such as a DB

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3
Q

Example of vertical scalability. t2.micro becomes…

A

t2.large

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4
Q

Horizontal scalability

A

Increase number of instances for an application

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5
Q

Horizontal scaling implies…

A

Distributed system

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6
Q

High availability

A

Running application or system in at least 2 AZ’s

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7
Q

Elasticity

A

Auto-scaling capabilities. (Cloud friendly)

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8
Q

Agility

A

Reduce time to make resources available

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9
Q

Load balancers

A

Servers that forward traffic to multiple servers

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10
Q

Why use a load balancer?

A

Spread load
Single domain name
Handle failures
Perform health checks
SSL Termination
HA across zones

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11
Q

ELB

A

Managed load balancer

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12
Q

Application Load Balancer OSI Layer

A

Layer 7 HTTP/HTTPS/gRPC

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13
Q

Network Load Balancer

A
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14
Q

Gateway Load Balancer

A

Layer 4
High performance
Static IP

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15
Q

Gateway Load Balancer

A

GENEVE Protocol (Layer 3)
Route traffic to firewalls, 3rd party virtual security appliances.
IDS/Deep packet inspection

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16
Q

ASG scale out

A

Add instances

17
Q

ASG scale in

A

Remove instances

18
Q

ASG acronym

A

Auto scaling group

19
Q

ASG goals

A

Scaling
Ensuring minimum and maximum machines running
Automatically register instances to a LB
Replace unhealthy instances

20
Q

Financial benefit of ASG

A

Run at optimal capacity

21
Q

Manual scaling

A

Update ASG size manually

22
Q

Dynamic scaling

A

Scale automatically

23
Q

Simpte/Step scaling

A

Performance thresholds for ASH to take action

24
Q

Target tracking scaling

A

Automatic scaling to a target number

25
Q

Scheduled scaling

A

Schedule scaling at certain times

26
Q

Predictive scaling

A

Machine learning used to predict scaling. Automatic scaling

AWS Cloud Practitioner (CLF-C02) (21 decks)

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