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1Z0-1124-24題庫分享 & 1Z0-1124-24題庫資料

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最新的 Oracle Cloud 1Z0-1124-24 免費考試真題 (Q29-Q34):

問題 #29
For maximum security, how should you subnet a VCN with a public web server, private app server, and DB server?

A. Separate public & private subnets for each server
B. All subnets in the same Availability Domain
C. Single public subnet for web, single private for app & DB
D. Overlapping public & private subnet address spaces

答案：D

解題說明：
Isolation: This approach physically separates the public web server, which is directly accessible from the internet, from the private app and DB servers. This minimizes the attack surface and ensures that even if the web server is compromised, the internal servers remain secure.
Control: You can configure security lists for each subnet with specific ingress and egress rules, further restricting access to each server based on its specific needs.
Best Practices: This aligns with security best practices in cloud environments, where segmentation and isolation are fundamental principles.
Here are the drawbacks of the other options:
A) Single public subnet for web, single private for app & DB:
This exposes the app and DB servers indirectly through the web server, increasing the attack surface.
Granular control of network access becomes difficult.
B) Overlapping public & private subnet address spaces:
This creates unnecessary complexity and potential for misconfiguration.
It offers no clear security benefit compared to separate subnets.
D) All subnets in the same Availability Domain:
This increases the risk of a single event impacting all servers.
Availability is improved by placing servers in different Availability Domains and connecting them through private subnets across those domains.

問題 #30
Which feature of Site-to-Site VPN helps IF A company requires high availability for its VPN connection to OCI

A. Dynamic routing between the on-premises network and VCN.
B. Multiple tunnel configurations with automatic failover.
C. Public IP addresses assigned to both sides of the VPN connection.
D. NAT Gateway integration for outbound traffic from the VCN.

答案：B

解題說明：
Here,s why:
Redundancy: By configuring multiple tunnels with automatic failover, you create redundancy in your VPN connection. If one tunnel experiences an outage, traffic seamlessly switches to the remaining operational tunnels, ensuring uninterrupted connectivity between your on-premises network and OCI VCN.
High Availability: This feature minimizes downtime and potential disruptions to your critical business operations.
Flexibility: You can configure multiple tunnels with different routing options (e.g., primary, secondary), bandwidths, and encryption settings to tailor your high availability solution to your specific needs and performance requirements.
The other options contribute to overall network functionality but don,t directly address high availability for the VPN connection:
A). Dynamic routing: Dynamic routing helps optimize communication paths but doesn,t provide automatic failover if a tunnel goes down.B. NAT Gateway integration: NAT Gateways manage outbound traffic and enhance security, but don,t offer automatic failover for VPN tunnels.D. Public IP addresses: While convenient for initial setup, public IPs alone don,t provide redundancy or automatic failover in case of tunnel issues.

問題 #31
.You''re designing a highly available hybrid network with redundant OCI VCNs. How can you ensure failover across VCNs in case of an outage?

A. Use FastConnect with active-passive failover configuration.
B. Configure multiple Site-to-Site VPN connections to different VCNs.
C. Enable public IP addresses on both VCNs for redundancy.
D. Implement IPSec tunnels with automatic failover mechanisms.

答案：B

解題說明：
VCN-Specific Failover: By establishing separate Site-to-Site VPN connections for each VCN, you create dedicated failover paths. If one VCN experiences an outage, traffic automatically switches to the remaining operational VCN through its respective VPN connection, minimizing downtime and disruption.
Cost-Effectiveness: Compared to options like FastConnect with dedicated physical connections, Site-to-Site VPN leverages the public internet for connectivity, potentially offering a more cost-efficient solution.
Flexibility: Site-to-Site VPN supports both dynamic routing (BGP) and static routing, allowing you to customize your failover behavior based on network requirements.
Scalability: You can easily add more VCNs and corresponding Site-to-Site VPN connections as your network grows.
While other options offer certain benefits, they might not be optimal for VCN-specific failover:
B). IPSec tunnels with automatic failover: This feature primarily helps with failover within a single VPN connection, not across different VCNs.C. FastConnect with active-passive failover: This option provides dedicated, low-latency connectivity but can be more expensive than Site-to-Site VPN and might not be feasible for all scenarios.D. Public IP addresses: While enabling basic connectivity, public IPs alone don,t provide automatic failover mechanisms across VCNs and can introduce security concerns.

問題 #32
In a multi-tier OCI architecture, which of the following is NOT a valid use case for the Bastion service?

A. Providing secure access to jump hosts for managing private resources within a VCN.
B. Enabling SSH connections to bastion hosts from external sources while restricting access to other resources.
C. Offering remote access to public-facing resources like web servers directly.
D. Implementing multi-factor authentication (MFA) for accessing bastion hosts.

答案：C

解題說明：
A, B, and C: These all fall within the core functionalities and intended use cases of a Bastion service:
A: Bastions are specifically designed to provide secure access to internal resources, including jump hosts, by acting as a central entry point with controlled access.
B: They allow establishing SSH connections from external sources while restricting access to other resources by enforcing policies and filtering traffic.
C: Bastion services can integrate with multi-factor authentication (MFA) for an additional layer of security when accessing them.
D: However, Bastions are not intended for directly accessing public-facing resources like web servers. These resources are typically designed to be accessible directly from the public internet. Exposing a Bastion to the public internet would defeat its purpose of securing access to internal resources and introduce unnecessary security risks.

問題 #33
In a multi-tier OCI architecture, which BEST describes the role of a Bastion service?

A. Provides remote desktop access directly to production instances.
B. Offers network segmentation within a single VCN subnet.
C. Enforces least privilege access control for all incoming connections.
D. Acts as a central jump point for secure access to internal resources.

答案：D

解題說明：
Here,s why the other options are not as accurate:
A). Provides remote desktop access directly to production instances: While Bastions can facilitate access to other resources, they themselves are not typically used for direct remote desktop access to production instances. This would bypass security measures established by the Bastion.C. Offers network segmentation within a single VCN subnet: Bastions do not directly provide network segmentation. They manage secure access, and network segmentation might be achieved in conjunction with them using other OCI services like subnets and security lists.D. Enforces least privilege access control for all incoming connections: While Bastions contribute to enforcing least privilege by controlling access and granting it based on policies, they are not the sole component responsible for all access control in the architecture. IAM policies and other security measures also play a role.Therefore, the primary function of a Bastion service in a multi-tier OCI architecture is to act as a secure, centralized entry point for authorized users to access internal resources like compute instances, databases, and other services. By managing access through temporary sessions and enforcing specific policies, Bastions help maintain security and adhere to the principle of least privilege.

問題 #34
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