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| Section | Weight | Objectives |
|---|---|---|
| Service Mesh | 16% | - Traffic Encryption and Service Mesh Architectures - Ingress and Gateway API |
| Architecture | 20% | - Cilium Architecture and Components - IP Address Management and Datapath Models |
| Network Observability | 10% | - Hubble CLI and UI - Hubble and Layer 7 Visibility |
| Network Policy | 18% | - Identity-Based Network Security - Policy Rules and Enforcement |
| eBPF | 10% | - eBPF and iptables-Based Networking - eBPF Role and Benefits |
| Installation and Configuration | 10% | - Installation and Connectivity Testing - Cilium CLI and Configuration |
| Cluster Mesh | 10% | - Multi-Cluster Connectivity - Service Discovery and Load Balancing |
| BGP and External Networking | 6% | - Egress Connectivity - Connecting Cilium Clusters to External Networks |
>> Cilium-Associate Vorbereitungsfragen <<
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40. Frage
Which component, when available, is able to handle IPAM requests?
Antwort: D
Begründung:
Technical explanation
The Cilium Operator handles IP address management responsibilities in IPAM modes that require cluster- wide or cloud-integrated allocation. Current documentation identifies the operator as responsible for IPAM in Azure IPAM, AWS ENI, and cluster-scope mode. Cloud-specific operators populate the appropriate allocation information in CiliumNode resources, after which node-local agents allocate addresses to endpoints from the available ranges.
The phrase "when available" is important because responsibilities vary by IPAM mode. Under Kubernetes host-scope IPAM, Kubernetes allocates each node's PodCIDR, and the Cilium agent consumes that range from the Kubernetes Node object. Nevertheless, among the supplied components, the operator is the component specifically associated with centralized IPAM requests and allocation management.
The Cilium agent implements each node's datapath and endpoint lifecycle but is not the general cluster-wide IPAM answer intended here. Cilium API Server is not the documented allocation component. The misspelled Cilium CNIPIugin refers to the CNI plugin, which requests networking setup when a pod is created but does not replace the operator's IPAM responsibilities.
Official references
Cilium Operator , Cilium IP Address Management
Study Guide topic: Cilium Operator responsibilities and IPAM modes.
41. Frage
Which encapsulation protocols are supported when configuring Cilium in tunnel mode?
Antwort: C
Begründung:
Technical explanation
Cilium tunnel mode supports VXLAN and Geneve encapsulation. In this routing model, Cilium nodes form an overlay mesh, and traffic exchanged between nodes is carried inside UDP-encapsulated packets. VXLAN is the default tunnel protocol and normally uses UDP port 8472. Geneve is the alternative and normally uses UDP port 6081. Operators select the protocol through the tunnel-protocol configuration setting, whose documented values are vxlan and geneve .
Encapsulation reduces the requirements placed on the underlying network. The underlay only needs to provide IP connectivity between the Kubernetes nodes and permit the selected UDP tunnel port. It does not need to learn or route individual PodCIDRs. Cilium also uses the tunnel metadata to carry information such as the source security identity, avoiding an additional identity lookup on the receiving node.
MPLS, OTV, STT, and EVPN are not supported values for Cilium's tunnel-protocol setting. EVPN may be used in broader data-center network designs, and MPLS is a carrier-routing technology, but neither is a Cilium overlay encapsulation choice. Therefore, B is the only supported pair.
Official references
Cilium Routing ; System Requirements .
Study Guide topic: Architecture.
42. Frage
Please review the output of cilium status below and answer the question that follows. Please note, the output has been modified for accessibility purposes.
Question 2 cilium status exhibit
Assume the cluster is healthy. What is correct about the ci 1 ium status command output above?
Antwort: C
Begründung:
Technical explanation
The status output shows Envoy DaemonSet: disabled (using embedded mode) . In embedded mode, Cilium starts Envoy as a separate process inside the Cilium agent pod when a feature requiring Layer 7 processing- such as an L7 network policy, protocol visibility, Ingress, or Gateway API-is used. This is precisely the behavior described in option B.
The remaining choices contradict the exhibit. The Cilium DaemonSet has a desired count of three, which ordinarily indicates three schedulable nodes running Cilium, not four. Hubble Relay: OK means the aggregation component is healthy. Hubble Relay connects to the Hubble instances associated with Cilium agents and presents a multi-node API to clients such as Hubble CLI and Hubble UI. Finally, ClusterMesh:
disabled rules out the claim that the installation is currently configured for Cilium Cluster Mesh service discovery and cross-cluster load balancing.
Cilium can alternatively run Envoy through the independently life-cycled cilium-envoy DaemonSet. That is not the deployment displayed here because the DaemonSet is explicitly disabled and embedded mode is reported.
Official references
Envoy deployment modes ; Hubble internals .
Study Guide topic: Architecture.
43. Frage
Which Cilium configuration is recommended to help identify the correct configuration of network policies without interrupting workload communications?
Antwort: A
Begründung:
Technical explanation
Policy Audit Mode allows administrators to evaluate the consequences of network policies before enforcing their deny decisions. Traffic that would ordinarily be rejected remains permitted, while Cilium records an audit verdict. These verdicts can be examined with Cilium monitoring tools and used to identify legitimate communications that are missing from the proposed policies.
This is especially valuable when introducing host policies or default-deny controls into an existing environment. An incomplete policy might otherwise block access to the Kubernetes API, node-management interfaces, DNS, monitoring systems, or other operational dependencies. The recommended workflow is to enable audit mode, observe traffic and policy verdicts, adjust the rules, confirm that all required communications receive allow verdicts, and then disable audit mode to begin enforcement.
DNS enforcement mode and HTTP audit mode are not the general Cilium configuration requested. "Policy enforcement mode" describes whether policies are normally enforced, but it does not provide the non- disruptive learning behavior in the question.
Audit mode should be treated as a temporary validation mechanism because it does not actually block disallowed traffic and does not persist across every agent-restart scenario.
Official references
Cilium Policy Audit Mode
Study Guide topic: Policy validation, audit verdicts, and safe policy rollout.
44. Frage
This an Ingress configuration. What is the equivalent Gateway API configuration?
Question 19 source Ingress
A)
Question 19 option A
B)
Question 19 option B
C)
Question 19 option C
D)
Question 19 option D
Antwort: A
Begründung:
Technical explanation
Option B correctly represents the Ingress as a Gateway and an attached HTTPRoute . The Gateway is named cilium , uses gatewayClassName: cilium , and exposes an HTTP listener on port 80. The HTTPRoute uses parentRefs with the same Gateway name, cilium , so the route attaches to the declared listener. Its two rules preserve the original routing behavior: /details with PathPrefix targets the details Service on port 9080, while / with PathPrefix targets productpage on port 9080.
Option A declares a Gateway named cilium but attaches its route to nginx-gateway . Because the parent reference does not identify the displayed Gateway, it is not equivalent. Options C and D use kind: Route ; the correct resource kind for HTTP path routing is HTTPRoute . They also contain malformed or altered backend and matching fields. Option D changes the details backend name, while option C contains incorrect route structure and path content.
Cilium's official migration example uses the same conversion pattern: the Ingress class becomes the Gateway' s class, paths move into HTTPRoute.rules , and the route identifies its Gateway through parentRefs .
The supplied key incorrectly identifies A. The verified answer is B.
Official references
HTTP Migration Example .
Study Guide topic: Service Mesh.
45. Frage
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