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NEW QUESTION # 80
You are designing a highly available web application in OCI. You've created a VCN with two public subnets across different Availability Domains (ADs). You need to enable IPv6 support for the application to cater to a growing number of IPv6-only clients. You plan to use a Load Balancer to distribute traffic to backend compute instances in the public subnets. Which of the following approaches ensures the highest level of resilience and IPv6 connectivity for your application?
Answer: C
NEW QUESTION # 81
A company has deployed a VCN in OCI with multiple subnets. Security requirements dictate that instances in different subnets within the same VCN should not be able to directly communicate with each other unless explicitly permitted. You are tasked with implementing this policy. What is the most appropriate approach to meet this requirement?
Answer: D
Explanation:
* Requirement:Restrict inter-subnet communication unless permitted.
* Options Analysis:
* A:Removing default route breaks all routing, overly restrictive; incorrect.
* B:Separate VCNs are excessive, complex; less practical.
* C:NSGs provide granular, explicit control; optimal approach.
* D:External firewall adds complexity, not VCN-native; inefficient.
* NSG Advantage:Instance-level rules enforce policy within VCN.
* Conclusion:NSGs are the most appropriate solution.
NSGs enable precise security within a VCN. The Oracle Networking Professional study guide states,
"Network Security Groups (NSGs) allow you to define strict ingress and egress rules for instances, ensuring inter-subnet communication is explicitly permitted as per security policies" (OCI Networking Documentation, Section: Network Security Groups). This is more efficient than VCN separation or external firewalls.
NEW QUESTION # 82
You have deployed an application on OCI that uses a Regional Load Balancer with an HTTPS listener. You want to enforce end-to-end encryption and ensure that the connection between the load balancer and the backend servers is also encrypted. Which load balancer configuration step is MANDATORY to achieve this?
Answer: D
Explanation:
* Goal: End-to-end encryption (client-to-LB and LB-to-backend).
* Option A: HTTP backend set leaves LB-to-backend unencrypted-incorrect.
* Option B: HTTPS listener and backend set with certificates ensures full encryption-correct and mandatory.
* Option C: Backend-only certificates lack LB termination-incorrect.
* Option D: TCP proxy bypasses LB encryption-incorrect.
* Conclusion: Option B is mandatory for end-to-end encryption.
Oracle states:
* "For end-to-end encryption, configure the HTTPS listener with an SSL certificate and set the backend protocol to HTTPS, requiring certificates on backend instances."This validates Option B. Reference:
Load Balancer SSL - Oracle Help Center(docs.oracle.com/en-us/iaas/Content/Balance/Tasks
/managingssl.htm).
NEW QUESTION # 83
When configuring transitive routing through a network appliance in a hub-and-spoke VCN topology, which configuration is necessary to ensure that traffic from a spoke VCN to another spoke VCN passes through the network appliance?
Answer: A
Explanation:
* Goal: Force spoke-to-spoke traffic via a network appliance in hub-and-spoke topology.
* Option A: Static routes on DRG to appliance ensure transitive routing-correct.
* Option B: Service Gateway is for OCI services-incorrect.
* Option C: Internet Gateway is public, not hub-and-spoke-incorrect.
* Option D: LPG bypasses the appliance-incorrect.
* Conclusion: Option A is necessary.
Oracle notes:
* "In a hub-and-spoke topology, configure DRG route tables with static routes to the network appliance's private IP for transitive routing between spokes."This supports Option A. Reference:Hub-and-Spoke Topology - Oracle Help Center(docs.oracle.com/en-us/iaas/Content/Network/Tasks/hubspoke.htm).
NEW QUESTION # 84
You are designing an OCI networking architecture for a multi-tier application using Infrastructure as Code (IaC). The architecture includes an OKE cluster for the front-end, a set of Compute instances for the back- end, and an Autonomous Database. You want to ensure that all traffic between these components is encrypted. You are using Transport Layer Security (TLS) for end-to-end encryption but are concerned about the overhead of encrypting all traffic within the VCN. Which approach provides the MOST balanced approach to security and performance, minimizing the overhead of encryption while still protecting sensitive data?
Answer: B
Explanation:
* Goal: Balance security and performance with encryption in a VCN.
* Option A: TLS only to the load balancer leaves internal traffic unencrypted, risking exposure- insufficient security.
* Option B: mTLS everywhere maximizes security but adds significant overhead (e.g., certificate management), impacting performance-overkill.
* Option C: NSGs/Security Lists control access but don't encrypt traffic-lacks protection for sensitive data.
* Option D: TLS between OKE and Compute secures app-tier communication. Oracle Database Vault ensures ADB traffic is encrypted efficiently, leveraging built-in features-balanced approach.
* Conclusion: Option D optimizes security and performance.
Oracle states:
* "Use TLS for application traffic between tiers. Autonomous Database with Database Vaultprovides encryption in transit and at rest, minimizing overhead."This supports Option D. Reference:Security in OCI Networking - Oracle Help Center(docs.oracle.com/en-us/iaas/Content/Network/Concepts
/securityoverview.htm).
NEW QUESTION # 85
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