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Master AWS Certified Cloud Practitioner CLF-C02 Exam

Route 53

Explore how AWS Route 53 works as a scalable DNS service by resolving domain names to IP addresses. Learn the process of DNS resolution, understand how Route 53 manages domain registration, hosting zones, and name servers. Discover different routing policies such as simple, failover, weighted, latency, geolocation, geoproximity, multivalue, and IP-based routing to optimize traffic routing for high availability and performance.

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Route 53 is a scalable Domain Name System (DNS) service. The “53” in Route 53 refers to the TCP and UDP port number 53, a standard port for DNS services. However, before diving into the concepts of Route 53, let's briefly review how DNS works.

What is DNS?

Every device connected to the internet has its unique IP addressIP address is short for Internet Protocol address. It is a unique numerical label assigned to each device connected to a computer network. IP addresses can be either IPv4 (32-bit) or IPv6 (128-bit)., enabling communication with it. When we browse the internet, we access web applications hosted on servers, each identified by a distinct IP address. For instance, consider the case of educative.io. If we assume that the content of educative.io is stored on a server with the IP address 104.18.2.119, then educative.io is a domain name that directs users to this server. We can access the same content using the educative.io domain name or the server’s IP address.

Let’s explore how DNS resolves the domain request for educative.io. Here, we will assume that the TLD server responds with the address of the authoritative server ...