Which of the following statements is correct about the number of security groups and rules applicable for an EC2-Classic instance and an EC2-VPC network interface?
Correct Answer:D
A security group acts as a virtual firewall that controls the traffic for one or more instances. When you launch an instance, you associate one or more security groups with the instance. You add rules to each security group that allow traffic to or from its associated instances. If you're using EC2-Classic, you must use security groups created specifically for EC2-Classic. In EC2-Classic, you can associate an instance with up to 500 security groups and add up to 100 rules to a security group. If you're using EC2-VPC, you must use security groups created specifically for your VPC. In EC2-VPC, you can associate a network interface with up to 5 security groups and add up to 50 rules to a security group.
Reference: http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/using-network-security.html
How is AWS readily distinguished from other vendors in the traditional IT computing landscape?
Correct Answer:C
You have subscribed to the AWS Business and Enterprise support plan. Your business has a backlog of problems, and you need about 20 of your IAM users to open technical support cases. How many users can open technical support cases under the AWS Business and Enterprise support plan?
Correct Answer:C
In the context of AWS support, the Business and Enterprise support plans allow an unlimited number of users to open technical support cases (supported by AWS Identity and Access Management (IAM)). Reference: https://aws.amazon.com/premiumsupport/faqs/
True or False: In Amazon EIastiCache replication groups of Redis, for performance tuning reasons, you can change the roles of the cache nodes within the replication group, with the primary and one of the replicas exchanging roles.
Correct Answer:C
In Amazon EIastiCache, a replication group is a collection of Redis Cache Clusters, with one primary read-write cluster and up to five secondary, read-only clusters, which are called read replicas. You can change the roles of the cache clusters within the replication group, with the primary cluster and one of the replicas exchanging roles. You might decide to do this for performance tuning reasons.
Reference: http://docs.aws.amazon.com/AmazonEIastiCache/Iatest/UserGuide/Replication.Redis.Groups.htmI
True or False: The Amazon EIastiCache clusters are not available for use in VPC at this time.
Correct Answer:D
Amazon Elasticache clusters can be run in an Amazon VPC. With Amazon VPC, you can define a virtual network topology and customize the network configuration to closely resemble a traditional network that you might operate in your own datacenter. You can now take advantage of the manageability, availability and scalability benefits of Amazon EIastiCache Clusters in your own isolated network. The same functionality of Amazon EIastiCache, including automatic failure detection, recovery, scaling, auto discovery, Amazon CIoudWatch metrics, and software patching, are now available in Amazon VPC. Reference:
http://aws.amazon.com/about-aws/whats-new/2012/12/20/amazon-elasticache-announces-support-for-a mazon-vpc/