A security architect is designing a secure private cloud environment for a government agency handling unclassified but sensitive data. The agency requires strict isolation between different departmental workloads and ensuring that network traffic between these workloads cannot be intercepted or modified by other tenants or external entities. Which networking construct is fundamental to achieving this level of isolation and secure communication within the private cloud?
- AContent Delivery Network (CDN) for traffic distribution.
- BSoftware-Defined Wide Area Network (SD-WAN).
- CVirtual Private Cloud (VPC) with granular network access control lists (ACLs).
- DPublic IP addresses with Network Address Translation (NAT).
Show answer & explanationAnswer & explanation
Correct answer: C. Virtual Private Cloud (VPC) with granular network access control lists (ACLs).
A Virtual Private Cloud (VPC) provides a logically isolated section of a public cloud where users can launch resources in a virtual network they define. With granular network ACLs and security groups, a VPC is fundamental for achieving strict isolation between departmental workloads and securing network traffic within a private cloud environment, preventing interception or modification by other tenants or external entities.
Why the other options are wrong
- A. A CDN is used to deliver content efficiently by caching it closer to users; it is not a networking construct for internal workload isolation and secure communication within a private cloud.
- B. SD-WAN optimizes connectivity across geographically dispersed sites and cloud environments, but it doesn't provide the fundamental network isolation and granular control within a single private cloud needed for departmental separation.
- D. Public IP addresses and NAT are for external connectivity and address conservation, not for internal network isolation and secure communication between workloads within a private cloud.
Virtual Private Cloud (VPC)
A logically isolated section of a public cloud, allowing users to provision and launch resources within a virtual network that they define, with full control over IP addresses, subnets, route tables, and network gateways.
- Provides network isolation and segmentation within a public cloud.
- Enables granular control over network access and security.
- Essential for multi-tenant environments and compliance requirements.
Memory trick: Cloud network isolation is like having 'private rooms' in a big hotel, each with its own 'locked door'.