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| Section | Weight | Objectives |
|---|---|---|
| Service Mesh | 16% | - Transparent traffic encryption - Ingress and Gateway API integration - Sidecar vs sidecarless architecture |
| Network Observability | 10% | - Hubble UI and troubleshooting basics - Hubble architecture and CLI usage - Layer 7 visibility and flow monitoring |
| BGP and External Networking | 6% | - BGP peering and service advertisement - External gateway integration |
| Architecture | 20% | - Cilium core architecture and components - CNI integration and kube-proxy replacement |
| Network Policy | 18% | - Cilium vs Kubernetes network policies - Policy enforcement modes - Identity-aware and L3–L7 policy models |
| Installation and Configuration | 10% | - Deployment methods (Helm, cilium-cli) - Post-install validation and connectivity testing |
| eBPF | 10% | - eBPF fundamentals and relevance to Cilium - eBPF-based networking, security, and observability |
| Cluster Mesh | 10% | - Cross-cluster load balancing and failover - Multi-cluster connectivity and service discovery |
>> Cilium-Associate Quizfragen Und Antworten <<
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38. Frage
Review the Cilium Network Policy in the YAML file.
It was deployed in the ns-cca namespace on cluster1
Cluster Mesh CiliumNetworkPolicy exhibit
Which statement Is correct?
Antwort: D
Begründung:
Technical explanation
The policy's endpointSelector selects the ship workload in the namespace containing the CiliumNetworkPolicy , which is ns-cca . It also explicitly includes io.cilium.k8s.policy.cluster: cluster1 , confirming that the selected source endpoint belongs to cluster1.
The egress rule authorizes communication to an endpoint carrying name: base and the cluster label io.cilium.
k8s.policy.cluster: cluster2 . Because the namespaced policy does not specify a different destination namespace through k8s:io.kubernetes.pod.namespace , the intended destination is the corresponding base workload in ns-cca on cluster2. Therefore, A matches the policy.
Options C and D incorrectly describe the rule as a deny rule. Cilium policy rules use an allow-list model unless an explicit egressDeny or ingressDeny section is present. The exhibit contains an ordinary egress rule, so matching traffic is authorized. Option B incorrectly places the destination in default .
Current Cilium versions require explicit cluster targeting for remote endpoints, which this policy provides through the cluster label.
Official references
Cluster Mesh Network Policy , Namespaces in Cilium Policy
Study Guide topic: Cluster Mesh labels, namespaced policies, and cross-cluster endpoint selection.
39. Frage
The application team would like to observe egress traffic with application level information for workloads running in a Cilium based Kubernetes Cluster Which features would offer this without the need for additional tooling?
Antwort: D
Begründung:
Technical explanation
Hubble UI and Hubble CLI are Cilium's integrated interfaces for examining workload network flows. Hubble records source and destination identities, namespaces, workloads, addresses, ports, forwarding verdicts, and drop reasons. When Layer 7 visibility is configured, its flow output can also contain application-level information such as HTTP methods, URLs, response codes, latency, and DNS queries. Filters can narrow the results by source workload, namespace, destination, protocol, port, or verdict, making Hubble appropriate for investigating egress behavior.
Hubble CLI provides detailed event-oriented inspection, while Hubble UI presents flows and service dependencies graphically. Hubble Relay aggregates the per-node Hubble APIs so these clients can obtain cluster-wide visibility.
Load balancing directs traffic but is not an observability interface. Kubernetes NetworkPolicy expresses permitted communications but does not by itself display application-level flow records. Fluentd and Grafana are external logging and visualization components and would violate the requirement to avoid additional tooling.
Layer 7 information requires supported traffic to be redirected through Cilium's L7 proxy. Hubble then exposes the resulting application-layer flow events through the built-in CLI or UI, making D the complete answer.
Official references
Network Observability with Hubble ; Inspecting Network Flows .
Study Guide topic: Network Observability.
40. Frage
Which one of the following Cilium Network Policies follow the correct syntax?
A)
Question 17 option A
B)
Question 17 option B
C)
Question 17 option C
D)
Question 17 option D
Antwort: C
Begründung:
Technical explanation
Option D uses the correct structure for permitting egress from selected endpoints to the local host entity. The endpointSelector selects endpoints whose label env equals dev . Because the intended traffic travels from those endpoints toward the host, the policy must contain an egress rule. An egress peer is expressed through toEntities , and host is the reserved entity representing the local host, including host-networked containers on that node.
Option A is invalid because fromEntities is an ingress-oriented field and cannot express an egress destination.
Option B uses nodeSelector , which selects nodes rather than workload endpoints and is only valid for node- level rules in a CiliumClusterwideNetworkPolicy ; it is not valid in the displayed namespaced CiliumNetworkPolicy . It also combines ingress with toEntities , reversing the rule direction. Option C has a valid workload selector but again uses toEntities under ingress ; ingress rules describe sources through constructs such as fromEntities .
Applying option D places the selected endpoints into egress default-deny mode and then expressly permits traffic whose destination is the host entity. Other egress traffic must be allowed separately.
Official references
Policy Enforcement and Rule Basics ; Endpoint Lifecycle policy examples .
Study Guide topic: Network Policy.
41. Frage
What are the differences between Ingress and Gateway API?
Antwort: B
Begründung:
Technical explanation
Ingress provides a comparatively simple API for exposing HTTP and HTTPS applications through host- and path-based routing. Gateway API is a broader, extensible family of resources that separates infrastructure configuration from application routing. Resources such as GatewayClass , Gateway , HTTPRoute , GRPCRoute , TLSRoute , TCPRoute , and UDPRoute model listeners, routes, protocols, ownership, and attachment relationships explicitly.
Gateway API was designed around operational roles. An infrastructure provider can manage the GatewayClass , a cluster operator can provision a Gateway , and an application team can own a route attached to that Gateway. This offers clearer delegation than the single Ingress resource and supports protocols and traffic-management functions beyond the original Ingress model.
The two APIs are not simply different names for identical functionality, so A is false. Option C is also inaccurate because Cilium's implementations of both Ingress and Gateway API integrate with its eBPF datapath and Envoy; Ingress is not inherently an iptables-only implementation. Option D incorrectly limits Gateway API to internal routing. It can expose internet-facing applications through generated LoadBalancer or NodePort Services or through host-network listeners.
Official references
Migrating from Ingress to Gateway ; Gateway API Support .
Study Guide topic: Service Mesh.
42. Frage
Which one of the following commands will correctly display show the Cilium configuration?
Antwort: D
Begründung:
Technical explanation
cilium config view is the Cilium CLI command used to display the current Cilium configuration. It reads the configuration associated with the selected Kubernetes context, Cilium namespace, and Helm release. The command belongs to the cilium config command group, which manages installation configuration.
Option B reverses the expected command structure and does not correspond to a documented Cilium CLI operation. Option D resembles command syntax used on traditional network appliances but is not part of the Cilium CLI. Option C is both textually corrupted and conceptually inaccurate: Cilium configuration is not generally exposed through a cluster-wide resource named ciliumconfig.cilium.io . Runtime settings are commonly represented through the Cilium ConfigMap and Helm release values, while specialized resources such as CiliumNodeConfig apply targeted per-node configuration.
The wording "display show" is a source-bank editing defect but does not affect the answer. Administrators should also distinguish the external cilium management CLI from cilium-dbg , which runs with or communicates with the node-local Cilium agent and provides detailed datapath and agent diagnostics.
Official references
cilium config view , Cilium Component Overview
Study Guide topic: Cilium CLI configuration inspection and command structure.
43. Frage
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