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NEW QUESTION 51
Someone is creating a VPC for their application hosting. He has created two private subnets in the same availability zone and created one subnet in a separate availability zone. He wants to make a High Availability system with an internal Elastic Load Balancer.
Which choice is true regarding internal ELBs in this scenario? (Choose 2 answers)
- A. Internal ELBs should only be launched within private subnets.
- B. Amazon ELB service does not allow subnet selection; instead it will automatically select all the available subnets of the VPC.
- C. Internal ELBs can support only one subnet in each availability zone.
- D. An internal ELB can support all the subnets irrespective of their zones.
Answer: A,C
Explanation:
Explanation
The Amazon Virtual Private Cloud (Amazon VPC) allows the user to define a virtual networking environment in a private, isolated section of the Amazon Web Services (AWS) cloud. The user has complete control over the virtual networking environment. Within this virtual private cloud, the user can launch AWS resources, such as elastic load balancers, and EC2 instances. There are two ELBs available with VPC: internet facing and internal (private) ELB. For internal servers, such as App servers the organization can create an internal load balancer in their VPC and then place back-end application instances behind the internal load balancer. The internal load balancer will route requests to the back-end application instances, which are also using private IP addresses and only accept requests from the internal load balancer. The Internal ELB supports only one subnet in each AZ and asks the user to select a subnet while configuring internal ELB.
http://docs.aws.amazon.com/ElasticLoadBalancing/latest/DeveloperGuide/USVPC_creating_basic_lb.html
NEW QUESTION 52
An organization is making software for the CIA in USA. CIA agreed to host the application on AWS but in a secure environment. The organization is thinking of hosting the application on the AWS GovCloud region.
Which of the below mentioned difference is not correct when the organization is hosting on the AWS GovCloud in comparison with the AWS standard region?
- A. GovCloud region authentication is isolated from Amazon.com.
- B. The billing for the AWS GovCLoud will be in a different account than the Standard AWS account.
- C. Physical and logical administrative access only to U.S. persons.
- D. It is physically isolated and has logical network isolation from all the other regions.
Answer: B
Explanation:
Explanation
AWS GovCloud (US) is an isolated AWS region designed to allow U.S. government agencies and customers to move sensitive workloads into the cloud by addressing their specific regulatory and compliance requirements. The AWS GovCloud (US) Region adheres to the U.S. International Traffic in Arms Regulations (ITAR) requirements. It has added advantages, such as:
Restricting physical and logical administrative access to U.S. persons only There will be a separate AWS GovCloud (US) credentials, such as access key and secret access key than the standard AWS account The user signs in with the IAM user name and password The AWS GovCloud (US) Region authentication is completely isolated from Amazon.com If the organization is planning to host on EC2 in AWS GovCloud then it will be billed to standard AWS account of organization since AWS GovCloud billing is linked with the standard AWS account and is not be billed separately.
http://docs.aws.amazon.com/govcloud-us/latest/UserGuide/whatis.html
NEW QUESTION 53
A user has set the IAM policy where it denies all requests if a request is not from IP
10.10.10.1/32. The other policy says allow all requests between 5 PM to 7 PM. What will happen when a user is requesting access from IP 55.109.10.12/32 at 6 PM?
- A. It will allow access
- B. IAM will throw an error for policy conflict
- C. It will deny access
- D. It is not possible to set a policy based on the time or IP
Answer: C
Explanation:
When a request is made, the AWS IAM policy decides whether a given request should be allowed or denied. The evaluation logic follows these rules:
By default, all requests are denied. (In general, requests made using the account credentials for resources in the account are always allowed.) An explicit allow policy overrides this default.
An explicit deny policy overrides any allows.
In this case since there are explicit deny and explicit allow statements. Thus, the request will be denied since deny overrides allow.
http://docs.aws.amazon.com/IAM/latest/UserGuide/AccessPolicyLanguage_EvaluationLogic.html
NEW QUESTION 54
An organization is having an application which can start and stop an EC2 instance as per schedule. The organization needs the MAC address of the instance to be registered with its software. The instance is launched in EC2-CLASSIC. How can the organization update the MAC registration every time an instance is booted?
- A. The instance MAC address never changes. Thus, it is not required to register the MAC address every time.
- B. The organization should provide a MAC address as a part of the user data. Thus, whenever the instance is booted the script assigns the fixed MAC address to that instance.
- C. AWS never provides a MAC address to an instance; instead the instance ID is used for identifying the instance for any software registration.
- D. The organization should write a boot strapping script which will get the MAC address from the instance metadata and use that script to register with the application.
Answer: D
Explanation:
AWS provides an on demand, scalable infrastructure. AWS EC2 allows the user to launch On- Demand instances. AWS does not provide a fixed MAC address to the instances launched in EC2-CLASSIC. If the instance is launched as a part of EC2-VPC, it can have an ENI which can have a fixed MAC. However, with EC2-CLASSIC, every time the instance is started or stopped it will have a new MAC address. To get this MAC, the organization can run a script on boot which can fetch the instance metadata and get the MAC address from that instance metadata. Once the MAC is received, the organization can register that MAC with the software.
http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/AESDG-chapter-instancedata.html
NEW QUESTION 55
A large company has many business units. Each business unit has multiple AWS accounts for different purposes. The CIO of the company sees that each business unit has data that would be useful to share with other parts of the company in total, there are about 10 PB of data that needs to be shared with users in 1,000 AWS accounts. The data is proprietary, so some of it should only be available to users with specific job types. Some of the data is used for throughput of intensive workloads, such as simulations. The number of accounts changes frequently because of new initiatives, acquisitions, and divestitures.
A Solutions Architect has been asked to design a system that will allow for sharing data for use in AWS with all of the employees in the company.
Which approach will allow for secure data sharing in scalable way?
- A. Store the data in a single Amazon S3 bucket. Create an IAM role for every combination of job type and business unit that allows to appropriate read/write access based on object prefixes in the S3 bucket.
The roles should have trust policies that allow the business unit's AWS accounts to assume their roles.
Use IAM in each business unit's AWS account to prevent them from assuming roles for a different job type. Users get credentials to access the data by using AssumeRole from their business unit's AWS account. Users can then use those credentials with an S3 client. - B. Store the data in a series of Amazon S3 buckets. Create an application running in Amazon EC2 that is integrated with the company's identity provider (IdP) that authenticates users and allows them to download or upload data through the application. The application uses the business unit and job type information in the IdP to control what users can upload and download through the application. The users can access the data through the application's API.
- C. Store the data in a series of Amazon S3 buckets. Create an AWS STS token vending machine that is integrated with the company's identity provider (IdP). When a user logs in, have the token vending machine attach an IAM policy that assumes the role that limits the user's access and/or upload only the data the user is authorized to access. Users can get credentials by authenticating to the token vending machine's website or API and then use those credentials with an S3 client.
- D. Store the data in a single Amazon S3 bucket. Write a bucket policy that uses conditions to grant read and write access where appropriate, based on each user's business unit and job type.
Determine the business unit with the AWS account accessing the bucket and the job type with a prefix in the IAM user's name. Users can access data by using IAM credentials from their business unit's AWS account with an S3 client.
Answer: D
Explanation:
A: is very work intensive, and requires editing for every user. While answer "B" apply the policy on the S3 token directly, using account-prefixes of users business unit.
D: even STS & Idp work together but all the users are already having AWS Accounts. Plus Token Vending Machine (TVM) is complicated and does not have enough documentation in AWS.
NEW QUESTION 56
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