Amazon Web Services Updated SOA-C02 Exam Questions and Answers by jannat

For high-performance computing (HPC) applications requiring minimal latency between nodes, using a placement group strategy is crucial.

Cluster Placement Group:

Provides low-latency network performance within a single Availability Zone by placing instances close together on the network.

Suitable for applications that require high throughput or low latency.

Partition Placement Group:

Helps reduce the impact of hardware failures by dividing instances into partitions, where each partition can be placed on distinct racks in the data center.

Suitable for applications that need high availability and fault tolerance.

Setting Up Placement Groups:

Create a Placement Group:

Open the Amazon EC2 console at Amazon EC2 Console.

In the navigation pane, choose Placement Groups.

Choose Create placement group, specify the name, and choose either Cluster or Partition as the strategy.

Launch Instances:

When launching new instances, specify the placement group name to ensure they are placed accordingly.

References:

Placement Groups

Creating and Managing Placement Groups

https://docs.aws.amazon.com/vpc/latest/peering/vpc-peering-routing.html

When establishing a VPC peering connection between two VPCs, you need to update the route tables of both VPCs to allow traffic to flow between them.

Route Table of VPC A (10.0.0.0/16):

Local Route: This route is automatically created to allow traffic within the VPC.

Destination: 10.0.0.0/16, Target: Local

Peering Connection Route: This route directs traffic destined for VPC B (172.31.0.0/16) through the VPC peering connection.

Destination: 172.31.0.0/16, Target: pcx-12345

Route Table of VPC B (172.31.0.0/16):

Local Route: This route is automatically created to allow traffic within the VPC.

Destination: 172.31.0.0/16, Target: Local

Peering Connection Route: This route directs traffic destined for VPC A (10.0.0.0/16) through the VPC peering connection.

Destination: 10.0.0.0/16, Target: pcx-12345

References:

VPC Peering Routing

https://docs.aws.amazon.com/AmazonCloudFront/latest/DeveloperGuide/ Cookies.html

You can configure each cache behavior to do one of the following: Forward all cookies to your origin – CloudFront includes all cookies sent by the viewer when it forwards requests to the origin. https://docs.aws.amazon.com/elastic loadbalancing/latest/application/sticky-sessions.html

By default, an Application Load Balancer routes each request independently to a registered target based on the chosen load-balancing algorithm.

 Group EC2 Instances Using Resource Groups:

Resource groups help organize and manage AWS resources based on tags and other criteria.

Steps:

Go to the AWS Management Console.

Navigate to AWS Resource Groups.

Create resource groups for similar EC2 instances based on tags or other criteria.