Amazon Route 53

Correct Answer: A policy that allows traffic to be routed to different endpoints based on different weights

A weighted routing policy in Amazon Route 53 allows traffic to be routed to different endpoints based on different weights. This is useful for load balancing or for routing traffic to different endpoints for A/B testing.

Correct Answer: A security protocol for adding digital signatures to DNS records

DNSSEC is a security protocol for adding digital signatures to DNS records, ensuring the authenticity and integrity of DNS data. It helps protect against forgery or tampering of DNS data, reducing the risk of DNS-related attacks, such as cache poisoning or man-in-the-middle attacks.

Correct Answer: To monitor the health of resources such as web servers or mail servers and avoid directing traffic to them if they are unhealthy.

Health checks are used to monitor the health of resources such as web servers or mail servers and avoid directing traffic to them if they are unhealthy. In addition, health checks can be used to enforce the performance of an SLA. DNS traffic management policies like failover and geolocation routing can use health checks to manage traffic according to the state of the target servers. The health check verifies whether the endpoints of a DNS name such as URLs and IP addresses are reachable and available to handle requests.