Which of the following is not a protocol which can be used when monitoring an endpoint using Route53 health checks

Answer options:

A.HTTP
B.HTTPS
C.TCP
D.UDP

Answer - D
The method that you want Amazon Route 53 to use to check the health of your endpoint:
· HTTP – Amazon Route 53 tries to establish a TCP connection. If successful, Amazon Route 53 submits an HTTP request and waits for an HTTP status code of 200 or greater and less than 400.
· HTTPS – Amazon Route 53 tries to establish a TCP connection. If successful, Amazon Route 53 submits an HTTPS request and waits for an HTTP status code of 200 or greater and less than 400.
· TCP – Amazon Route 53 tries to establish a TCP connection.
 For more information on creating route53 health checks, please visit the below link:
http://docs.aws.amazon.com/Route53/latest/DeveloperGuide/health-checks-creating.html