A short explanation of common AWS Terms:
Route53 – DNS service of AWS – PS : 53 is default Domain Name System/Standard port hence the name Route53
Cahcing the files part of CDN
Connecting ur physcial datacenter to AWS.
EC2 – Elastic Compute Cloud
VMs which run the services
EC2 Container Service – similar to docker – Not for exam
Elastic Beanstalk: upload any code in elastic beanstalk and it will prepare underlying needed aws infra.
EC2 u have ssh access and tinker with os but lambda is serverless , u just upload ur code no ssh access imp but – Not in exam
Lightsail: – can install wordpress etc in cloud for u .. with very less inputs needed from ur end for config etc. – Not in exam