Master Oracle 1Z0-1124-25 Exam with Reliable Practice Questions
Upgrade to PremiumA 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?
Correct : C
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.
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Your company has decided to migrate its on-premises data center to OCI. As a network engineer, you need to establish a secure and reliable connection between the on-premises network and the OCI VCN with the following constraints: high bandwidth requirements, low latency requirements, secure private connection, and redundant connectivity crucial for business continuity. Which is the MOST suitable and resilient solution, considering the VCN gateway options?
Correct : D
Constraints: High bandwidth, low latency, secure private connection, redundancy.
Option A: Single VPN Connect offers security but lacks high bandwidth, low latency, and redundancy---unsuitable for migration needs.
Option B: Multiple VPNs improve redundancy but still rely on public internet, limiting bandwidth and latency performance compared to dedicated circuits.
Option C: Single FastConnect provides high bandwidth, low latency, and privacy via a dedicated line, but lacks redundancy.
Option D: Multiple FastConnect circuits ensure high bandwidth and low latency with redundancy. Adding multiple VPNs as backup enhances resilience, meeting all constraints.
Conclusion: Option D is the most suitable and resilient, balancing performance and continuity.
Oracle states:
'FastConnect provides a private, high-bandwidth, low-latency connection to OCI. Use multiple circuits for redundancy.'
'Combine FastConnect with IPSec VPN for additional failover options.'
Option D aligns with this guidance. Reference: FastConnect Overview - Oracle Help Center (docs.oracle.com/en-us/iaas/Content/Network/Tasks/fastconnect.htm).
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You're automating the creation of multiple VCNs across different OCI regions using Cloud Shell scripting. Which authentication method within Cloud Shell is best suited to programmatically authenticate with OCI, ensuring both security and scalability for this automation task?
Correct : C
Requirements: Secure, scalable authentication for Cloud Shell scripting.
Methods:
API Keys: Manual, less secure if stored.
Instance Principals: Credential-less, dynamic.
Terraform with Vault: Secure but complex for scripting.
Evaluate Options:
A: API keys in script are insecure; not scalable.
B: Persistent storage risks exposure; less secure.
C: Instance Principals use IAM, no credentials; best fit.
D: Overkill for simple scripting, better for IaC; less suited.
Conclusion: Instance Principals offer security and scalability.
Instance Principals simplify automation. The Oracle Networking Professional study guide states, 'Instance Principals allow Cloud Shell to authenticate via dynamic groups without storing credentials, ideal for secure, scalable scripting' (OCI Networking Documentation, Section: Authentication in Cloud Shell). This avoids key management issues.
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You have configured DNSSEC for your domain hosted on OCI DNS. You understand the importance of regularly rotating your Key Signing Key (KSK) to maintain security best practices. Which of the following statements regarding KSK rotation in OCI DNS is TRUE?
Correct : C
Objective: Identify the true statement about KSK rotation in OCI DNS.
Option A: OCI DNS automates much of the process but requires user initiation, not fully automated---incorrect.
Option B: OCI DNS generates keys internally; manual generation and upload aren't required---incorrect.
Option C: OCI DNS offers a ''KSK Rollover'' feature that, once enabled, automates the rotation process, ensuring minimal disruption---correct.
Option D: KSK rotation is supported via the rollover feature---incorrect.
Conclusion: Option C accurately describes OCI DNS KSK rotation.
Oracle documentation confirms:
'OCI DNS supports KSK rotation through the KSK Rollover feature. Enable it to automatically rotate keys while maintaining DNS resolution continuity.'
This validates Option C. Reference: DNSSEC in OCI DNS - Oracle Help Center (docs.oracle.com/en-us/iaas/Content/DNS/Tasks/managingdnssec.htm).
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Your company is migrating its legacy application to OCI. This application uses self-signed certificates. As part of the migration, you want to replace these with certificates issued by a trusted Certificate Authority (CA) managed through OCI Certificates. What is the most secure and recommended method to handle this transition?
Correct : C
Objective: Securely transition from self-signed to trusted CA certificates.
Option A: Importing self-signed certificates into OCI Certificates doesn't improve security---incorrect.
Option B: Immediate replacement risks outages if clients don't trust the new CA---unrecommended.
Option C: Gradual replacement with OCI Certificates, updating client truststores, ensures security and minimizes disruption---correct.
Option D: Bypassing validation via WAF weakens security---incorrect.
Conclusion: Option C is the most secure and recommended method.
Oracle advises:
'Replace self-signed certificates with OCI Certificates from a trusted CA. Perform a phased rollout and update client truststores to avoid disruptions.'
This validates Option C. Reference: OCI Certificates Overview - Oracle Help Center (docs.oracle.com/en-us/iaas/Content/Security/Certificates/overview.htm).
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