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Oracle Cloud Infrastructure 2024 Networking Professional Sample Questions (Q80-Q85):

NEW QUESTION # 80
Which of the following best describes the role of certificates in securing communication within a multi-tier OCI architecture?

A. They primarily secure communication between bastion hosts and private resources.
B. They are essential for enabling authentication and encryption in all inter-tier communication.
C. They are only needed for securing access to public-facing resources like web servers.
D. They are primarily used for signing code and securing software deployments.

Answer: B

Explanation:
Here,s why:
A). Communication between bastion hosts and private resources can leverage certificates, but it,s not the primary use case. They play a more significant role in communication across all tiers.C. Certificates are crucial for securing public-facing resources, but their value extends beyond that to secure internal communication as well.D. While code signing and secure deployments are valid uses of certificates, it,s not the primary focus within a multi-tier architecture context.How certificates facilitate secure communication:
Mutual TLS (mTLS): Certificates enable mTLS, where both communicating parties authenticate each other using certificates issued by a trusted Certificate Authority (CA). This ensures the identities of the communicating entities and prevents unauthorized access.
Encryption: Communication channels can be encrypted using Transport Layer Security (TLS), which relies on certificates to establish secure connections and protect data transmissions from eavesdropping and tampering.
By implementing certificates and mTLS/TLS for inter-tier communication, you achieve:
Stronger authentication: Verifying the identity of each service or instance prevents unauthorized access and impersonation attempts.
Data confidentiality: Encryption protects sensitive data in transit, minimizing the risk of exposure if intercepted.
Improved overall security posture: Implementing mTLS/TLS across tiers significantly enhances the security of your multi-tier architecture.

NEW QUESTION # 81
which of the following is NOT a benefit of using Infrastructure as Code (IaC) for managing network resources?

A. Automated deployment and configuration of network resources for consistent infrastructure.
B. Easier scaling of network resources based on application demands.
C. Improved security and compliance through version control and audit trails.
D. Manual configuration of network resources remains preferred for greater control.

Answer: D

Explanation:
While manual configuration offers direct control in specific scenarios, IaC provides numerous advantages for managing network resources effectively:
Automation: IaC automates deployment and configuration, reducing manual effort and minimizing errors. This ensures consistent infrastructure across environments and simplifies resource management.
Security and compliance: IaC promotes security by storing infrastructure configurations in version control systems, enabling audit trails and rollbacks to previous configurations if needed. This facilitates compliance with security standards and regulations.
Scalability: IaC enables easier scaling of network resources by defining reusable templates and automating deployments based on changing application demands. This helps you adapt to increased traffic or resource requirements efficiently.
Therefore, while manual configuration might be preferred in rare cases where absolute control is paramount, IaC offers significant benefits for most network resource management scenarios.

NEW QUESTION # 82
Which of the following actions REQUIRES a Network Firewall rule change?

A. Configuring a new security list for a subnet within the VCN.
B. Modifying the Network Firewall,s resource tags.
C. Scaling the Network Firewall instance up or down.
D. Adding a new subnet to the VCN protected by the firewall.

Answer: D

Explanation:
A). Scaling the Network Firewall instance up or down: Scaling the firewall instance typically only affects its performance capacity, not the actual rules controlling traffic flow.B. Modifying the Network Firewall,s resource tags: Resource tags are primarily for organizing and identifying resources, and updating them doesn,t impact firewall rules.C. Adding a new subnet to the VCN protected by the firewall: When you add a new subnet, traffic to and from that subnet isn,t automatically subject to the existing firewall rules. You need to create new rules explicitly allowing or denying traffic to/from the new subnet, ensuring it aligns with your security policies.D. Configuring a new security list for a subnet within the VCN: Security lists operate at the subnet level, controlling traffic entering and leaving that specific subnet. While they interact with the overall network security strategy, changes to a subnet,s security list don,t directly necessitate modifications to the Network Firewall rules themselves.

NEW QUESTION # 83
You''ve established a DRG connection between your on-premises network and an OCI VCN. How can you ensure secure communication between them?

A. Configure public IP addresses on both sides of the connection.
B. Enable internet connectivity on both the VCN and on-premises network.
C. Use NAT Gateway for outbound traffic from the VCN.
D. Implement IPSec tunnels with encryption and authentication.

Answer: D

Explanation:
IPSec Security: IPSec (Internet Protocol Security) encrypts and authenticates all traffic in the tunnel, protecting data confidentiality and integrity during transmission. This prevents unauthorized access or data alterations even if someone intercepts the traffic.
Private Communication: Tunnels established through IPSec create a private and secure communication channel that bypasses the public internet, minimizing the risk of exposure to external threats.
DRG Compatibility: IPSec tunnels are fully compatible with DRGs, allowing you to leverage the centralized connectivity and policy management benefits of DRGs while ensuring secure communication.
Comparison with other options:
Public IP Addresses (A): Using public IPs exposes both sides to potential security risks as traffic traverses the public internet.
NAT Gateway (C): While NAT Gateway improves outbound security by hiding internal IP addresses, it doesn,t encrypt traffic, leaving it vulnerable to interception.
Internet Connectivity (D): Enabling internet connectivity on both sides creates unnecessary exposure to security threats and undermines the purpose of a secure private connection.

NEW QUESTION # 84
When creating a Service Gateway endpoint for inter-tenancy communication, what approach reflects the principle of least privilege?

A. Specify the allowed resources in both the source and destination tenancies.
B. Allow access to all resources in the destination tenancy for specific users.
C. Grant access to specific resources in the destination tenancy for all users.
D. Grant broad access to all resources in the source tenancy.

Answer: A

Explanation:
A). Granting broad access to all resources in the source tenancy: This grants excessive and unnecessary access, creating a significant security risk.C. Allowing access to all resources in the destination tenancy for specific users: While better than option A, it still grants broader access than necessary to users, exposing more resources than required.D. Granting access to specific resources in the destination tenancy for all users: This gives all users access to specific resources, but it doesn,t limit access based on individual user needs, potentially exceeding the minimum required permissions.Option B is the most secure and adheres to the principle of least privilege by:
Specifying allowed resources in the source tenancy: Limits access to specific resources, preventing unauthorized access from other source resources.
Specifying allowed resources in the destination tenancy: Grants access only to the necessary resources within the other tenancy, minimizing the attack surface and potential damage.

NEW QUESTION # 85
......

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