While setting up an AWS managed VPN connection, a SysOPs Administrator creates a customer gateway resource in AWS. The customer gateway device resides in a data center with a NAT gateway in front of it.
What address should be used to create the customer gateway resource?

• A.The private IP address of the customer gateway device
• B.The MAC address of the NAT device in front of the customer gateway device
• C.The public IP address of the customer gateway device
• D.The public IP address of the NAT device in front of the customer gateway device

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A SysOps administrator is evaluating Amazon Route 53 DNS options to address concerns about high availability for an on-premises website. The website consists of two servers: a primary active server and a secondary passive server. Route 53 should route traffic to the primary server if the associated health check returns 2xx or 3xx HTTP codes. All other traffic should be directed to the secondary passive server. The failover record type, set ID, and routing policy have been set appropriately for both primary and secondary servers.
Which next step should be taken to configure Route 53?

• A.Create an alias record for each server with evaluate target health set to yes.
  Associate the records with the Route 53 HTTP health check.
• B.Create an A record for each server.
  Associate the records with the Route 53 HTTP health check.
• C.Create an A record for each server.
  Associate the records with the Route 53 TCP health check.
• D.Create an alias record for each server with evaluate target health set to yes.
  Associate the records with the Route 53 TCP health check.

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A SysOps Administrator is asked to create an Amazon VPC IPv4 subnet that will support a minimum of 30 network resources simultaneously.
What is the minimum CIDR netmask that will sustain this requirement?

• A./25
• B./26
• C./27
• D./28

Correct Answer: C

Explanation

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A user has created a Cloudformation stack. The stack creates AWS services, such as EC2 instances, ELB, AutoScaling, and RDS. While creating the stack it created EC2, ELB and AutoScaling but failed to create RDS. What will Cloudformation do in this scenario?

• A.Cloudformation can never throw an error after launching a few services since it verifies all the steps before launching
• B.It will warn the user about the error and ask the user to manually create RDS
• C.Rollback all the changes and terminate all the created services
• D.It will wait for the user's input about the error and correct the mistake after the input

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A user has configured a VPC with a new subnet. The user has created a security group. The user wants to configure that instances of the same subnet communicate with each other. How can the user configure this with the security group?

• A.There is no need for a security group modification as all the instances can communicate with each other inside the same subnet
• B.Configure the subnet as the source in the security group and allow traffic on all the protocols and ports
• C.Configure the security group itself as the source and allow traffic on all the protocols and ports
• D.The user has to use VPC peering to configure this

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