Cloud Computing

AWS Transit Gateway turns a collection of VPC, VPN, and Direct Connect connectivity requirements into a regional routing hub. That can simplify large networks, but it also creates a new control plane whose route tables, attachment associations, propagation, and ownership determine which networks can communicate. A single Transit Gateway does not automatically create a safe hub-and-spoke architecture; it creates the mechanisms from which one can be built. AWS publishes specific Transit Gateway design practices around attachment subnets, BGP, route-table design, and resilience. Production architecture should use those mechanics to create…

Elastic Load Balancing sits at a deceptively simple point in AWS architecture: accept traffic and send it to healthy targets. The design choices around load-balancer type, Availability Zones, cross-zone behavior, health checks, TLS termination, target registration, session behavior, and failure handling determine whether that simple function improves resilience or hides a fragile application behind a managed endpoint. AWS recommends multi-Availability-Zone use for load balancers, and Application Load Balancers require at least two Availability Zones. The production question is not merely whether a load balancer exists. It is whether the routing…

Multi-Region architecture is one of the easiest AWS patterns to overstate. Running something in two Regions does not automatically create high availability. The application needs independent capacity, a traffic-control mechanism, replicated or reconstructable state, compatible configuration, observable health, and a practiced process for deciding when to move traffic. Hidden cross-Region dependencies can leave the “secondary” Region unusable during the event it was meant to survive. The design should begin with business recovery requirements and only then select services. Amazon Application Recovery Controller (ARC) includes routing-control and Region switch capabilities for…

Azure governance questions on Microsoft AZ-104 are not really about memorizing three unrelated features. Azure Policy, resource locks, role-based access, tags, management groups, and compliance reporting all answer different parts of the same administrator question: how do you let teams operate at scale without losing control of the environment? For Microsoft AZ-104 preparation, Microsoft’s current study guide expects administrators to manage Azure resources and governance as part of day-to-day operations. The important skill is knowing which control solves which problem. A policy can evaluate or enforce resource standards. A lock…

Backup and disaster recovery are related, but they solve different failure problems. That distinction is central to Microsoft AZ-104. Azure Backup creates protected recovery points so data or workloads can be restored. Azure Site Recovery continuously replicates supported workloads and orchestrates failover so services can run from another location when the primary environment is unavailable. For Microsoft AZ-104 preparation, Microsoft’s current study guide covers Recovery Services vaults, Backup vaults, backup policies, backup and restore operations, Azure Site Recovery, secondary-region failover, and monitoring through reports and alerts. Candidates should therefore think…

Bicep makes Azure infrastructure easier to express than raw ARM JSON, but infrastructure as code is not automatically safe just because the syntax is cleaner. Production reliability comes from how modules are designed, how changes are validated, how environments are parameterized, how identities and policies interact with deployments, and how failures are diagnosed when Azure Resource Manager rejects or partially applies a change. The most useful mental model is to treat Bicep as software that declares desired resource state. It deserves source control, code review, automated validation, controlled promotion, and…

Azure observability is easy to overcomplicate because the platform offers metrics, logs, traces, alerts, dashboards, workbooks, Application Insights, Log Analytics, data collection rules, and several specialized monitoring experiences. Production design becomes clearer when those services are treated as parts of one evidence system: detect that something is wrong, understand what changed, locate the failing dependency, and give operators enough context to decide what to do next. The key is to design the telemetry around operational questions rather than around what each Azure service happens to expose by default. A large…

Azure Private Link is often described as a way to access a platform service over a private IP, but that summary hides the operational work. A private endpoint adds a network interface in a virtual network and connects it privately to a supported service. The application still depends on identity, authorization, routing, firewall policy, and—most importantly—correct DNS. Creating the endpoint is only one step in the architecture. Production designs fail when teams treat Private Link as a checkbox instead of a name-resolution and access-path design. The reliable approach is to…

Azure Virtual Desktop looks simple when reduced to session hosts and user connections, but the user experience depends on a chain of services. The AZ-140 Azure Virtual Desktop path exposes many of those moving parts, while architecture work has to connect them into explicit failure and recovery domains: identity, the AVD control plane, host pools, virtual networks, DNS, profile storage, FSLogix, application delivery, Azure capacity, and the business systems users open after sign-in. Resilience comes from understanding how each layer fails and which failures are local, zonal, regional, or external…

Cloud migration frameworks are often reduced to a list of “R” strategies, but choosing rehost, replatform, refactor, rearchitect, rebuild, replace, retain, or retire is the end of an analysis, not the beginning. The AZ-305 Azure Solutions Architect path reflects the same principle: architecture begins with constraints and outcomes, not a favorite service. A real workload sits inside business deadlines, licensing constraints, data dependencies, identity models, network paths, operational skills, regulatory requirements, vendor roadmaps, recovery objectives, and application portfolios. Moving it successfully requires a decision process that makes those constraints visible…

GitHub Actions can make Azure delivery remarkably direct, and the delivery/security trade-offs sit naturally beside the AZ-400 DevOps Engineer skill set: a pull request changes application code or infrastructure, automated checks run, an artifact is produced, and a protected workflow promotes it into an Azure environment. That simplicity is valuable, but it can also hide the most important architecture questions. Which identity is the workflow using? What can that identity change? Which code is trusted enough to request a token? Can a pull request reach production credentials? Is the artifact…

Cost architecture is not the same thing as cost cutting. An Azure design can be inexpensive and still be a poor business decision if it creates operational fragility, slows delivery, or makes future change prohibitively expensive. The architect’s job is to shape a system whose spending remains visible, attributable, and defensible while the workload still meets its security, reliability, performance, and compliance requirements. That distinction matters for architects working across the Microsoft ecosystem. The AZ-305 architecture path emphasizes design choices, while the AZ-104 administration path exposes the operational consequences of…

Azure Policy becomes difficult only when it is treated as a collection of isolated rules. At enterprise scale, the real problem is governance design: deciding which controls belong at management-group, subscription, or resource scope; grouping policies into initiatives; handling legitimate exceptions; remediating existing resources; testing changes safely; and keeping policy ownership clear as the platform evolves. This matters to candidates and practitioners around both AZ-104 and AZ-305. Administrators encounter assignments, compliance, tags, locks, and remediation operationally. Architects need to decide where policy fits in the landing-zone and governance model. The…

Azure networking failures are rarely caused by one missing checkbox. They usually emerge from the interaction of routing, name resolution, load balancing, security policy, private endpoints, hybrid connectivity, and regional dependencies. A network can look correct in a diagram and still fail because the packet path is asymmetric, DNS resolves to the wrong endpoint, health probes cannot reach the backend, or a shared hub becomes a hidden single point of operational failure. That is why Azure networking design is relevant to both AZ-104 administrators and AZ-305 architects. The practical skill…

Azure Firewall and Web Application Firewall are often mentioned together because both are security controls, but they protect different layers of traffic. Treating them as interchangeable leads to weak designs. Azure Firewall provides centralized stateful network filtering across Layer 3 through Layer 7 capabilities, while Azure WAF is focused on HTTP and HTTPS application-layer attacks such as injection, cross-site scripting, malicious bots, and other web-specific patterns. For Azure administrators and architects preparing around AZ-104 and AZ-305, the important skill is deciding where each control belongs in the traffic path. A…