Before to describe the different networking services in AWS, it is important to clarify that AWS doesn’t support Multicast.
Virtual Private Cloud (VPC)
It enables you to create a private network fully-managed in the same way you can do it in your datacenter. You have complete control over your virtual networking environment, including selection of your own IP address range, creation of subnets, and configuration of route tables and network gateways. Additionally, you can create a Hardware Virtual Private Network (VPN) connection between your corporate datacenter and your VPC and leverage the AWS cloud as an extension of your corporate datacenter.
Route 53
It is a DNS service. It use a global DNS servers network to publish DNSs, when a client needs to resolve a DNS name, it will reach the AWS DNS nearest to it, that reduce the network latency. Route 53 effectively connects user requests to infrastructure running in AWS – such as Amazon EC2 instances, Elastic Load Balancers, or Amazon S3 buckets – and can also be used to route users to infrastructure outside of AWS.
Elastic Load Balancing
It is a load balancer service. ELB supports routing and load balancing for HTTP, HTTPS and TCP traffic to EC2 instances. ELB automatically scales its request handling capacity to meet the demands of application traffic. Additionally, Elastic Load Balancing offers integration with Auto Scaling to ensure that you have back-end capacity to meet varying levels of traffic levels without requiring manual intervention. Single CNAME provides stable entry point for DNS configuration.
Direct Connect
It establish a dedicated network connection from your legacy datacenter to AWS VPC. AWS Direct Connect makes it easy to scale your connection to meet your needs. AWS Direct Connect provides 1 Gbps and 10 Gbps connections, and you can easily provision multiple connections if you need more capacity. You can also use AWS Direct Connect instead of establishing a VPN connection over the Internet to your Amazon VPC, avoiding the need to utilize VPN hardware that frequently can’t support data transfer rates above 4 Gbps.
Angel Perez Palacios 