Exam AWS Certified Advanced Networking - Specialty ANS-C01 topic 1 question 92 discussion

https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/ec2-networking.html

1) The security appliance runs on an Amazon EC2 instance 2) Needs to improve the network performance between the on-premises data center and the security appliance. Placement Groups is to allow better throughput between EC2 instances in your VPC. This does not improve throughput between the SINGULAR EC2 security appliance (security appliance runs on an Amazon EC2 instance) and on-prem DC. Therefore, increasing instance size (more vCPU/RAM) is the correct answer. Ref: Look at Table 1 and 2, last page of this document https://www.paloaltonetworks.com/apps/pan/public/downloadResource?pagePath=/content/pan/en_US/resources/datasheets/vm-series-spec-sheet All the best.

A C are the answers. There is only a single EC2 instance, so placement groups have no benefit. Increasing the size for more resources or changing the instance type can offer better performance.

Read https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/ec2-instance-network-bandwidth.html The available network bandwidth of an instance depends on the number of vCPUs that it has. For example, an m5.8xlarge instance has 32 vCPUs and 10 Gbps network bandwidth, and an m5.16xlarge instance has 64 vCPUs and 20 Gbps network bandwidth. However, instances might not achieve this bandwidth; for example, if they exceed network allowances at the instance level, such as packet per second or number of tracked connections. How much of the available bandwidth the traffic can utilize depends on the number of vCPUs and the destination. For example, an m5.16xlarge instance has 64 vCPUs, so traffic to another instance in the Region can utilize the full bandwidth available (20 Gbps). However, traffic to another instance in a different Region can utilize only 50% of the bandwidth available (10 Gbps).

C. Increase the EC2 instance size is not right, should change to 'type optimized for network performance, such as the C5n or R5n instance families.' not only sise

Option A: Using an EC2 instance that supports enhanced networking can improve network performance by offloading network processing tasks to the underlying hardware, reducing latency and improving throughput. Option E: Attaching multiple elastic network interfaces (ENIs) to the EC2 instance can increase network capacity and distribute network traffic across multiple interfaces, effectively improving overall network performance.

A, C is the right. When you launch a new EC2 instance, the EC2 service attempts to place the instance in such a way that all of your instances are spread out across underlying hardware to minimize correlated failures. You can use placement groups to influence the placement of a group of interdependent instances to meet the needs of your workload. Take a look on this: https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/placement-groups.html

AC is correct - placement group is useless here It is used for multiple EC2's within a AZ (not VPC).

https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/ec2-networking.html

Agree as there is no use from the placement group if its a single ec2

like WartyWarthog mentioned, only one instance, so the placement groups are useless, increasing the instance size will give better througputs and cpu.

Placement groups are unrelated in this scenario with a single EC2 instance.

Should be AC. There is only one EC2 instance involved in this scenario so placement groups is not a good option.