EEdukron DevOps Library
Microsoft AzureIntermediate19 submodules

Azure Networking

Be precise about Layer 4 versus Layer 7, regional versus global services, inbound versus outbound flow, route precedence, NSG evaluation, and private DNS for private endpoints.

Interview focus

Answer with mechanism, evidence, and trade-offs

Be precise about Layer 4 versus Layer 7, regional versus global services, inbound versus outbound flow, route precedence, NSG evaluation, and private DNS for private endpoints.

Strong-answer signals

  • Design VNets, subnets, and routing
  • Apply NSGs and application security groups
  • Choose public, private, NAT, VPN, ExpressRoute, and peering connectivity
  • Select load-balancing and global-routing services
  • Use private endpoints and Network Watcher

Flow diagram

Azure Networking answer flow

Use this flow to structure design and scenario answers from context through evidence and recovery.

  1. 01
    Plan addressesAzure Networking stage 1: plan addresses with an auditable result before the next stage begins.
  2. 02
    Segment subnetsAzure Networking stage 2: segment subnets with an auditable result before the next stage begins.
  3. 03
    Select routesAzure Networking stage 3: select routes with an auditable result before the next stage begins.
  4. 04
    Enforce boundariesAzure Networking stage 4: enforce boundaries with an auditable result before the next stage begins.
  5. 05
    Publish or privatize serviceAzure Networking stage 5: publish or privatize service with an auditable result before the next stage begins.
  6. 06
    Observe packet pathAzure Networking stage 6: observe packet path with an auditable result before the next stage begins.

Practical interview scenario

Design, diagnose, and defend your decision

A private application spans on-premises and two Azure regions while internet users need global HTTPS access. Design ingress, private connectivity, DNS, egress, failover, and diagnostics.

A complete response should include
  • Business impact and technical constraints
  • Architecture or execution sequence
  • Identity, security, and evidence
  • Failure handling and recovery
  • Metrics and next improvement

Module question spotlight

Five questions to practise first

Model answers included
01Virtual NetworkWhat problem does Virtual Network solve, how does it work in Azure Networking, and what is it commonly confused with?

Define the mechanism and ownership boundary first. Explain that it governs how a request is named, addressed, routed, filtered, transported, protected, and delivered to a healthy endpoint, then contrast it with the adjacent responsibilities represented by the module prerequisites and the following Subnets concept. Close with a concrete validation signal.

02SubnetsHow would you implement and validate Subnets for a production workload?

Start from workload constraints and existing state. Follow the packet from resolution through route, security boundary, transport or TLS session, load distribution, and application response. Include identity, dependencies, normal and failure tests, monitoring, and an explicit recovery decision.

03NSGA change involving NSG causes a production symptom. What evidence would you inspect and how would you recover safely?

Establish scope and recent change, inspect the native configuration and event or log evidence, test the dependency boundary, apply the smallest reversible mitigation, verify user impact has recovered, and retain the findings for permanent prevention.

04ASGWhat problem does ASG solve, how does it work in Azure Networking, and what is it commonly confused with?

Define the mechanism and ownership boundary first. Explain that it provides a concrete platform capability that must be configured, secured, validated, observed, and owned throughout its lifecycle, then contrast it with the adjacent responsibilities represented by the preceding NSG concept and the following Route Tables concept. Close with a concrete validation signal.

05Route TablesHow would you implement and validate Route Tables for a production workload?

Start from workload constraints and existing state. Follow the packet from resolution through route, security boundary, transport or TLS session, load distribution, and application response. Include identity, dependencies, normal and failure tests, monitoring, and an explicit recovery decision.

Complete question bank

57 topic-aware interview questions

19 submodules
02

Subnets

Concept, implementation, and troubleshooting questions with model answers, evaluation points, follow-ups, and weak-answer warnings.

Open question set
03

NSG

Concept, implementation, and troubleshooting questions with model answers, evaluation points, follow-ups, and weak-answer warnings.

Open question set
04

ASG

Concept, implementation, and troubleshooting questions with model answers, evaluation points, follow-ups, and weak-answer warnings.

Open question set
05

Route Tables

Concept, implementation, and troubleshooting questions with model answers, evaluation points, follow-ups, and weak-answer warnings.

Open question set
06

Public IP

Concept, implementation, and troubleshooting questions with model answers, evaluation points, follow-ups, and weak-answer warnings.

Open question set
07

Private IP

Concept, implementation, and troubleshooting questions with model answers, evaluation points, follow-ups, and weak-answer warnings.

Open question set
08

NAT Gateway

Concept, implementation, and troubleshooting questions with model answers, evaluation points, follow-ups, and weak-answer warnings.

Open question set
09

VNet Peering

Concept, implementation, and troubleshooting questions with model answers, evaluation points, follow-ups, and weak-answer warnings.

Open question set
10

VPN Gateway

Concept, implementation, and troubleshooting questions with model answers, evaluation points, follow-ups, and weak-answer warnings.

Open question set
11

ExpressRoute

Concept, implementation, and troubleshooting questions with model answers, evaluation points, follow-ups, and weak-answer warnings.

Open question set
17

Private Link

Concept, implementation, and troubleshooting questions with model answers, evaluation points, follow-ups, and weak-answer warnings.

Open question set
18

Azure DNS

Concept, implementation, and troubleshooting questions with model answers, evaluation points, follow-ups, and weak-answer warnings.

Open question set