AWS other Concepts

Question 1

Auto Scaling group ASG

Answer 1

ASG scales the application where there is high load

Question 2

Application load balancer

Answer 2

distributes the load based on set rules

Question 3

NAT Gateway

Answer 3

Application talks to internet via nat and it exposes NAT gateways public ip to external world

Question 4

Bastian Host or Jump server

Answer 4

Application server in private subnet does not have Public ip address and cannot be access from outside .so using bastion host or jump server application is accessed from public subnet. using this approach there will be proper logging of the activity to app server

Question 5

Elastic IP

Answer 5

Static IP that nerver change even if Ec2 is restarted terminated and bought up

Question 6

How bastion host is created

Answer 6

create ec2 in same vpc and public subnet with ssh enabled from out side

Question 7

How to design highly available applications

Answer 7

use multiple availability zone

Question 8

How to design highly scalable applications

Answer 8

ASG

Question 9

How private subnet can access internet

Answer 9

Nat gatweway

Question 10

Strict network access to vpc

Answer 10

NACL

Question 11

Aws service can access s3 securetly

Answer 11

S3 gateway vpc endpoints

Question 12

NACL and Security groups diffrences

Answer 12

subnet and instance
stateless stateful

Question 13

What is Cloud watch

Answer 13

Gate keeper for aws account helps in implementing Monitoring,Alerting,Reporting and logging

Question 14

Advantages with cloud watch

Answer 14

Monitoring
Real life metrics
alarms
log insights
Custom Metrics
Cost Optimisation
scaling

Question 15

what is aws config

Answer 15

Set compliance for your AWS account by defining aws managed rules or custom lambda rule like enforcing i am users to add monitoring for all ec2 instances.

If rule is not met it should that ec2 is non compliant and mails can be sent for the same to i am users.trigger lambda when config changes.

Question 16

Type sof Load balancers

Answer 16

Application load balance
Network Load balancer
Gateway load balancer

Question 17

when to used application load balancer

Answer 17

when you want to intercept https request and handle load balancing in application layer user ALB, High in cost, Many capabilities, more latency because adding layers. eg host based load balancing

Question 18

When should you use NLB

Answer 18

Apply load nbalancing on transport layer and network layer adding advanced routing tecniques . Where there should not be latency like game servers,streaming servers.Low cost,high transmission rate,also have sticky sessions.

Question 19

Sticky sessions

Answer 19

in streaming content all packets should originate from same servers thus maintaining sticky sessions