Category Archives: Technology

Kubernetes NetworkPolicy defines allowed traffic for selected Pods at the IP-address and port layers. It is a workload segmentation primitive, not a firewall product by itself: enforcement depends on a network plugin that supports the NetworkPolicy API. KCNA includes Kubernetes networking and security fundamentals, while production NetworkPolicy authoring requires precise knowledge of selector scope and […]

Third-party security governance begins where procurement checklists end. An organization can assess a supplier once, collect a security questionnaire, and still remain exposed to service outages, concentration risk, subcontractors, insecure integrations, data misuse, or major control changes that occur after contract signature. Governance has to manage the relationship across selection, contracting, onboarding, operation, change, incident […]

Now Assist knowledge grounding is the discipline of constraining generated answers with indexed enterprise content that the user is actually allowed to see. Grounding improves relevance because the model receives a bounded context rather than answering only from general model knowledge, but the quality of the result depends on retrieval, permissions, source freshness, duplication, and […]

Kubernetes probes look simple in YAML, but at scale they are part of a distributed failure-control system. A liveness failure can restart a container, a readiness failure can remove a Pod from Service traffic, and a startup probe can suppress the other two checks while a slow process initializes. Treating all three as a generic […]

Split tunneling changes a remote-access VPN from a single controlled path into a policy decision about which traffic enters the enterprise security stack and which traffic exits directly through the user’s local network. That can reduce concentrator bandwidth and improve performance for cloud services, but it also creates a second trust path on the same […]

Service Graph Connectors bring third-party operational data into the ServiceNow CMDB using standardized integration patterns, IntegrationHub ETL, and Identification and Reconciliation Engine processing. Governance is necessary because a connector can change thousands of configuration items and relationships at scale. A technically successful import can still damage the CMDB if class mapping, source authority, refresh behavior, […]

Resource requests and limits shape two different control loops in Kubernetes. Requests tell the scheduler how much capacity a workload needs for placement, while limits constrain how much the container may consume after it starts. The distinction is central to the Linux Foundation KCNA because scheduling, node pressure, and container isolation all depend on it. […]

Web cache poisoning occurs when an attacker causes a shared cache to store a response influenced by malicious request input and later serve that stored response to other users. The dangerous part is amplification: one crafted request can affect many subsequent requests if the cache and origin application disagree about which inputs define a unique […]

ServiceNow AIOps event correlation turns a stream of monitoring events and alerts into smaller groups that operators can investigate as one issue. The value is not simply noise reduction. A useful correlation group should preserve causal clues, reflect service topology or meaningful shared attributes, identify a likely primary alert, and reduce duplicate work without hiding […]

Choosing between smaller and larger language models is a workload-design decision rather than a contest over benchmark rankings. Microsoft AI-103 directly addresses selecting small, large, and multimodal models for Foundry workloads; Amazon AWS AIP-C01 covers foundation-model integration and production optimization in AWS. Those are related but not interchangeable service configurations. A sound selection process compares […]

Container image signing adds cryptographic evidence to an artifact so a deployment system can verify who signed it and whether the referenced image matches the signed content. It addresses a supply-chain question that vulnerability scanning alone cannot answer: is this the artifact the trusted build or release process actually approved? Image signing is a specialized […]

eBPF makes it possible to run verified programs at selected points in the Linux kernel and collect high-value runtime data without modifying every application. In cloud-native environments, that can expose network flows, system-call behavior, process execution, latency, and other kernel-level signals that are difficult to obtain from application instrumentation alone. The KCNA exam includes foundational […]

Kubernetes admission control is the policy layer that evaluates API requests after authentication and authorization but before an accepted object is persisted. That position makes admission a powerful preventative boundary: the cluster can reject or mutate an unsafe workload definition before controllers schedule it. KCNA introduces Kubernetes security and API administration at a conceptual level; […]

Terraform drift is the gap between the infrastructure Terraform expects and the infrastructure that actually exists. It commonly appears after manual console changes, emergency fixes, automated systems that modify managed resources, provider-side defaults, or organizational processes that allow changes outside the Terraform workflow. The current Terraform Associate 004 exam gives candidates the state and planning […]

Terraform import is how an existing infrastructure object becomes bound to a Terraform resource address so the object can be managed through configuration and state. The operation sounds like a migration shortcut, but the difficult work is not the import command itself. The difficult work is creating configuration that accurately describes the existing object without […]