AWS Cloud Developer: Networking and Elasticity

Question 1

Networking

Answer 1

Networks reliably carry loads of data around the globe allowing for the delivery of content and applications with high availability. The network is the foundation of your infrastructure.

Cloud networking includes:

network architecture
network connectivity
application delivery
global performance
delivery

Question 2

IP

Answer 2

Internet Protocol

an IP address is assigned to each device connected to the internet

Domain name entered into Browser - DNS asks Domain authority for the IP address the name is registered to - user is routed to address

Question 3

DNS

Answer 3

Domain Name server

Question 4

Domain Authority

Answer 4

The service the domain name was registered with

Question 5

Cloud Connectivity

Answer 5

Include services that offer reliable and cost-effective ways that route end users to internet application

Question 6

Route 53

Answer 6

Route 53 is a cloud domain name system (DNS) service that has servers distributed around the globe used to translates human-readable names like www.google.com into the numeric IP addresses like 74.125.21.147.

Question 7

Why are DNS health checks essential?

Answer 7

Ensure availability of web servers and provides DNS failover which routes traffic to alternate locations preventing outages

Question 8

What are the features of AWS Route 53

Answer 8

scales automatically to manage spikes in DNS queries

allows you to register a domain name (or manage an existing)

routes internet traffic to the resources for your domain
checks the health of your resources

Route 53 allows you to route users based on the user’s geographic location.

Question 9

How to scale vertically

Answer 9

Stop the instance and resize it by increasing RAM, Storage, CPU, IO

Question 10

EC2 Autoscaling

Answer 10

EC2 Auto Scaling is a service that monitors your EC2 instances and automatically adjusts by adding or removing EC2 instances based on conditions you define in order to maintain application availability and provide peak performance to your users.

Automatically scale in and out based on needs.
Included automatically with Amazon EC2.
Automate how your Amazon EC2 instances are managed.

Question 11

How does EC2 Autoscaling work with Amazon Messaging service

Answer 11

Can be integrated with Messaging service to:

• alert you when Instances are launching or terminating
• provide you with information about the instance that is being launched or terminated

Question 12

Benefits of EC2 autoscaling

Answer 12

IMPROVE FAULT TOLERANCE
Amazon EC2 Auto Scaling can detect when an instance is unhealthy, terminate it, and replace it with a new one.

INCREASE APPLICATION AVAILABILITY
Amazon EC2 Auto Scaling ensures that your application always has the right amount of compute, and also proactively provisions capacity with Predictive Scaling.

LOWER COSTS
Amazon EC2 Auto Scaling adds instances only when needed, and can scale across purchase options to optimize performance and cost.

Question 13

Elastic Load Balancing

Answer 13

Elastic Load Balancing automatically distributes incoming application traffic across multiple servers.

Question 14

What services does Elastic Load Balancing work with

Answer 14

Elastic Load Balancing works with EC2 Instances, containers, IP addresses, and Lambda functions.

Question 15

Main benefit of Elastic Load Balancing

Answer 15

Provides redundancy and performance

Question 16

How does Elastic Load Balancing improve Redundancy

Answer 16

If you lose a server, the load balancer will send requests to other working servers. This feature maintains continuous operations in an emergency

Question 17

How does Elastic Load Balancing improve performance

Answer 17

If a server starts having issues or bottlenecks, the load balancer will add more servers to the pool of available servers. Auto-scaling automatically adjusts the capacity to maintain a steady state.

Question 18

Application Load Balancer

Answer 18

Application Load Balancer is best suited for load balancing of HTTP and HTTPS traffic and provides advanced request routing targeted at the delivery of modern application architectures, including microservices and containers. Application Load Balancer routes traffic to targets within Amazon VPC based on the content of the request.

Question 19

Network Load Balancer

Answer 19

Network Load Balancer is best suited for load balancing of Transmission Control Protocol (TCP), User Datagram Protocol (UDP), and Transport Layer Security (TLS) traffic where extreme performance is required. Network Load Balancer routes traffic to targets within Amazon VPC and is capable of handling millions of requests per second while maintaining ultra-low latencies.

Question 20

Gateway Load Balancer

Answer 20

Gateway Load Balancer makes it easy to deploy, scale, and run third-party virtual networking appliances. Providing load balancing and auto scaling for fleets of third-party appliances, Gateway Load Balancer is transparent to the source and destination of traffic. This capability makes it well suited for working with third-party appliances for security, network analytics, and other use cases.

Question 21

Classic Load Balancer

Answer 21

Classic Load Balancer provides basic load balancing across multiple Amazon EC2 instances and operates at both the request level and the connection level. Classic Load Balancer is intended for applications that were built within the EC2-Classic network.

Question 22

Launch template

Answer 22

Definition: A Launch template specifies instance configuration information, such as, AMI ID, the instance type, a key pair, security groups, and the other parameters that you use to launch EC2 instances.