Revise network traffic security section for clarity

[spotakash]

Updated the section on network traffic security to clarify the flow of traffic and the use of Azure ExpressRoute. Added notes on ExpressRoute peering models and architectural considerations for private connectivity.

[prmerger-automator]

@spotakash : Thanks for your contribution! The author(s) and reviewer(s) have been notified to review your proposed change.

[prmerger-automator]

@spotakash : Thanks for your contribution! The author(s) and reviewer(s) have been notified to review your proposed change.

[learn-build-service-prod]

Learn Build status updates of commit 6fb94a7:

💡 Validation status: suggestions

File	Status	Preview URL	Details
data-integration/gateway/service-gateway-onprem-indepth.md	💡Suggestion		Details

data-integration/gateway/service-gateway-onprem-indepth.md

• Line 52, Column 79: [Suggestion: docs-link-absolute - See documentation] Absolute link 'https://learn.microsoft.com/azure/expressroute/expressroute-faqs?#microsoft-peering' will be broken in isolated environments. Replace with a relative link.

For more details, please refer to the build report.

Note: Your PR may contain errors or warnings or suggestions unrelated to the files you changed. This happens when external dependencies like GitHub alias, Microsoft alias, cross repo links are updated. Please use these instructions to resolve them.

[v-dirichards]

@whhender

Can you review the proposed changes?

Important: When the changes are ready for publication, adding a #sign-off comment is the best way to signal that the PR is ready for the review team to merge.

#label:"aq-pr-triaged"
@MicrosoftDocs/public-repo-pr-review-team

[Copilot]

Pull request overview

This PR updates the on-premises gateway architecture documentation to clarify the network traffic flow between the gateway, Azure Relay, and the Power BI backend, and to add guidance on how Azure ExpressRoute peering models influence private connectivity design choices.

Changes:

• Clarifies the end-to-end traffic flow and describes how ExpressRoute can avoid public internet traversal.
• Adds an admonition note explaining how ExpressRoute peering models affect connectivity and suggests an architecture pattern when Private Peering is required.

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.

[whhender]

@spotakash - There are a couple of suggestions from GitHub. Can you review and apply those?

[learn-build-service-prod]

Learn Build status updates of commit 0828dbe:

💡 Validation status: suggestions

File	Status	Preview URL	Details
data-integration/gateway/service-gateway-onprem-indepth.md	💡Suggestion		Details

data-integration/gateway/service-gateway-onprem-indepth.md

• Line 52, Column 79: [Suggestion: docs-link-absolute - See documentation] Absolute link 'https://learn.microsoft.com/azure/expressroute/expressroute-faqs#microsoft-peering' will be broken in isolated environments. Replace with a relative link.

For more details, please refer to the build report.

Note: Your PR may contain errors or warnings or suggestions unrelated to the files you changed. This happens when external dependencies like GitHub alias, Microsoft alias, cross repo links are updated. Please use these instructions to resolve them.

[spotakash]

@whhender applied fix for suggestion, please check and proceed for next steps