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Question 824 - SAP-C01 discussion

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A user is planning to host a web server as well as an app server on a single EC2 instance which is a part of the public subnet of a VPC. How can the user setup to have two separate public IPs and separate security groups for both the application as well as the web server?

A.
Launch VPC with two separate subnets and make the instance a part of both the subnets.
Answers
A.
Launch VPC with two separate subnets and make the instance a part of both the subnets.
B.
Launch a VPC instance with two network interfaces. Assign a separate security group and elastic IP to them.
Answers
B.
Launch a VPC instance with two network interfaces. Assign a separate security group and elastic IP to them.
C.
Launch a VPC instance with two network interfaces. Assign a separate security group to each and AWS will assign a separate public IP to them.
Answers
C.
Launch a VPC instance with two network interfaces. Assign a separate security group to each and AWS will assign a separate public IP to them.
D.
Launch a VPC with ELB such that it redirects requests to separate VPC instances of the public subnet.
Answers
D.
Launch a VPC with ELB such that it redirects requests to separate VPC instances of the public subnet.
Suggested answer: B

Explanation:

If you need to host multiple websites (with different IPs) on a single EC2 instance, the following is the suggested method from AWS. Launch a VPC instance with two network interfaces. Assign elastic IPs from VPC EIP pool to those interfaces (Because, when the user has attached more than one network interface with an instance, AWS cannot assign public IPs to them.) Assign separate Security Groups if separate Security Groups are needed This scenario also helps for operating network appliances, such as firewalls or load balancers that have multiple private IP addresses for each network interface.

Reference: http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/MultipleIP.html

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asked 16/09/2024
Kamran Kamran
46 questions
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