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Difficulty: HardHigh-Performing and Scalable Network Architectures

A global gaming company hosts a real-time multiplayer game on Amazon ECS clusters deployed behind Network Load Balancers (NLBs) in the `us-east-1`, `eu-west-1`, and `ap-southeast-1` Regions. The game clients communicate using UDP for state synchronization. Players are experiencing high jitter, packet loss, and latency fluctuations due to congestion on the public internet. The company requires a networking architecture that minimizes latency and packet loss by routing traffic over the AWS private network backbone, while providing a single set of static entry-point IP addresses.

Which architectural solution should a solutions architect recommend to meet these requirements?

  1. A
    Configure Amazon Route 53 with latency-based routing to resolve the game's hostname directly to the regional Network Load Balancers, enabling client-side DNS caching to reduce lookup times.
  2. Deploy AWS Global Accelerator to provide static Anycast IP addresses, and configure the regional Network Load Balancers as endpoints. Configure the game clients to connect directly to these Anycast IP addresses.Answer
  3. C
    Establish a single AWS Site-to-Site VPN connection from the game client networks to a central AWS Transit Gateway to encrypt and route the UDP gaming traffic, relying on a single tunnel to dynamically scale to 4 Gbps4\text{ Gbps} of throughput.
  4. D
    Configure stateful Network Access Control Lists (NACLs) at the subnet level in each regional VPC to track connections and prioritize UDP gaming traffic over standard TCP web traffic.

Answer

Deploy AWS Global Accelerator to provide static Anycast IP addresses, and configure the regional Network Load Balancers as endpoints. Configure the game clients to connect directly to these Anycast IP addresses.
AWS Global Accelerator uses Anycast routing to ingest client traffic at the nearest AWS edge location and then routes it over the congestion-free, high-performance AWS global private network backbone directly to the Network Load Balancers. This significantly reduces latency, jitter, and packet loss for UDP traffic compared to routing over the public internet, while providing static Anycast IP addresses as a single entry point.

Step-by-Step Solution

1
Identify the key performance and architectural requirements.
Requirements are: route UDP traffic, minimize jitter and packet loss, bypass public internet congestion, and provide static entry-point IP addresses.
This establishes the constraints that any valid solution must satisfy.
2
Evaluate the routing path of AWS Global Accelerator.
Global Accelerator uses Anycast to ingest traffic at the closest edge location and routes it over the private AWS backbone to the regional NLB endpoints, supporting both TCP and UDP.
This validates if Global Accelerator can bypass public internet routing and support the game's protocols.
3
Assess the performance characteristics of the alternative options.
Route 53 latency routing still routes traffic over the public internet. A single VPN connection has a hard throughput limit of 1.25 Gbps1.25\text{ Gbps}. Network ACLs are stateless and cannot prioritize traffic.
This confirms that the other solutions are either technically impossible or do not solve the latency and jitter issues.

Key Concept

AWS Global Accelerator uses Anycast to route global user traffic over the AWS private network backbone, reducing latency, jitter, and packet loss for UDP/TCP workloads while providing static entry-point IP addresses.
Estimated Time:2m 0s
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High-Performing and Scalable Network Architectures

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