Exam 1z0-1072-21 topic 1 question 7 discussion

Actual exam question from Oracle's 1z0-1072-21

Question #: 7
Topic #: 1

You created a virtual cloud network (VCN) with three private subnets. Two of the subnets contain application servers and the third subnet contains a DB System. The application requires a shared file system so you have provisioned one using the file storage service (FSS).
You also created the corresponding mount target in one of the application subnets. The VCN security lists are properly configured so that the application servers can access file storage service (FSS). The security team changed the settings for the DB System to have read-only access to the file system. However, when they went to test this they are unable to access the (FSS).
What change should you make to allow access to (FSS)?

A. Create an NFS export option that allows READ_ONLY access where the source is the CIDR range of the DB System subnet.
B. Modify the security list associated with the subnet where the mount target resides. Change the ingress rules corresponding to the DB System subnet to be stateful.
C. Create an instance principal for the DB System. Write an Identity and Access Management (IAM) policy that allows the instance principal read-only access to the file storage service.
D. Modify the security list associated with the subnet where the mount target resides. Change the ingress rules corresponding to the DB System subnet to be stateless.

Show Suggested Answer

Suggested Answer: A 🗳️

by igorifilipovic at Jan. 13, 2023, 9:16 a.m.

Comments

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SaeedMonem

5 months, 3 weeks ago

I vote for "B" since the scenario says that the security team has change the DB System access to Read-only, which means that have already configured the export options. Accordingly, answer "A" is not valid.

upvoted 1 times

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BharatDixit

6 months, 3 weeks ago

Selected Answer: B

I agree with @igorifilipovic. The issue is they are NOT able to access FSS at all this is very important so "A" can NOT be the answer. I go for "B".

upvoted 1 times

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noahsark

6 months, 3 weeks ago

Selected Answer: A

Using NFS export option access controls, you can limit clients' ability to connect to the file system and view or write data. For example, if you want to allow clients to consume but not update resources in your file system, you can set access to Read Only. https://docs.oracle.com/en-us/iaas/Content/File/Tasks/exportoptions.htm

upvoted 2 times

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igorifilipovic

1 year ago

Hm..."The VCN security lists are properly configured so that the application servers can access file storage service (FSS). The security team changed the settings for the DB System to have read-only access to the file system." Clearly something was not done properly. Clearly it is network problem - so or security list for nfs are not using statefull option, or security team didn't deal with nfs export properly. I vote B.