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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: eBPF | 10% | - eBPF-based networking, security, and observability - eBPF fundamentals and relevance to Cilium |
| Topic 2: Installation and Configuration | 10% | - Post-install validation and connectivity testing - Deployment methods (Helm, cilium-cli) |
| Topic 3: Service Mesh | 16% | - Ingress and Gateway API integration - Sidecar vs sidecarless architecture - Transparent traffic encryption |
| Topic 4: Architecture | 20% | - Cilium core architecture and components - CNI integration and kube-proxy replacement |
| Topic 5: BGP and External Networking | 6% | - External gateway integration - BGP peering and service advertisement |
| Topic 6: Network Observability | 10% | - Hubble UI and troubleshooting basics - Hubble architecture and CLI usage - Layer 7 visibility and flow monitoring |
| Topic 7: Network Policy | 18% | - Cilium vs Kubernetes network policies - Identity-aware and L3–L7 policy models - Policy enforcement modes |
| Topic 8: Cluster Mesh | 10% | - Multi-cluster connectivity and service discovery - Cross-cluster load balancing and failover |
>> Cilium-Associate Exam Guide <<
These questions will familiarize you with the Cilium-Associate exam format and the content that will be covered in the actual test. You will not get a passing score if you rely on outdated practice questions. ExamsReviews has assembled a brief yet concise study material that will aid you in acing the Cilium Certified AssociateCCA (Cilium-Associate) exam on the first attempt. This prep material has been compiled under the expert guidance of 90,000 experienced Linux Foundation professionals from around the globe.
NEW QUESTION # 61
Which component manages the allocation of per-node PodCIDRs in the cluster-scope IPAM (IP address management) mode?
Answer: C
Explanation:
Technical explanation
In cluster-scope IPAM, the Cilium Operator allocates a PodCIDR to each node from the configured cluster- wide address pool. It records those allocations in each node's CiliumNode custom resource, specifically under spec.ipam.podCIDRs . The Cilium agent waits for this allocation during startup and then performs host-local allocation of individual pod addresses from the CIDR assigned to its node.
This division of responsibility explains why C is correct. The agent consumes its assigned range and allocates endpoint addresses locally, but it does not independently choose the cluster-wide per-node PodCIDR. The Operator coordinates those ranges to prevent nodes from receiving overlapping allocations.
Options A and D describe Kubernetes host-scope IPAM rather than Cilium cluster-scope IPAM. In Kubernetes host-scope mode, the Kubernetes controller manager assigns PodCIDRs and exposes them through spec.podCIDR or spec.podCIDRs in the standard Kubernetes Node resource. Cluster-scope mode is specifically useful when Kubernetes is not configured to perform that allocation or when Cilium should control the cluster address pool.
Therefore, the managing component and resource are the Cilium Operator and CiliumNode , respectively.
Official references
Cluster-Pool IPAM ; Cluster Scope IPAM .
Study Guide topic: Installation and Configuration.
NEW QUESTION # 62
If you are required to block ingress traffic from external IPs for all pods in your cluster, which of the following network policies would be the best fit?
Answer: B
Explanation:
Technical explanation
A cluster-wide requirement is best implemented with CiliumClusterwideNetworkPolicy , whose correct resource spelling is CiliumClusterwideNetworkPolicy . Unlike a namespaced CiliumNetworkPolicy , this Cilium CRD is non-namespaced and can select endpoints across the entire cluster.
To deny external ingress for every Cilium-managed pod, a cluster-wide policy can use an empty endpointSelector and an ingressDeny rule selecting the world entity. Cilium defines world as network endpoints outside the cluster. An alternative allow-list construction can permit only the cluster entity, thereby excluding external sources, but an explicit deny rule usually communicates the requirement more directly.
A standard Kubernetes NetworkPolicy and a CiliumNetworkPolicy are namespaced, requiring repeated resources in every applicable namespace. CiliumGlobalPolicy is not a valid Cilium resource type. Although the option capitalizes "Wide" differently from the actual kind, D unmistakably identifies the intended cluster- scoped policy.
Official references
Cilium Deny Policies , Cilium Network Policy Types
Study Guide topic: Cluster-scoped policies, external traffic, and reserved entities.
NEW QUESTION # 63
What is true about Layer 7 protocol visibility in Cilium?
Answer: C
Explanation:
Technical explanation
Layer 7 protocol visibility redirects traffic matching the relevant L7 rules to Cilium's node-local proxy, which is Envoy. Envoy parses supported application protocols and supplies the resulting request or response metadata to Cilium's observability pipeline. Therefore, C correctly identifies the architectural consequence of enabling this visibility.
The feature requires L7 proxy support and an appropriate CiliumNetworkPolicy containing Layer 7 rules. A standard Kubernetes NetworkPolicy is limited to Layer 3 and Layer 4 concepts and cannot express Cilium's HTTP, DNS, or generic application-protocol rules, so B is incorrect.
A is also incorrect. DNS policy and visibility are commonly applied to pod egress queries, and Cilium's model is not restricted to ingress-only DNS visibility. D overstates protocol coverage. Cilium supports defined L7 parsers and policy types-most prominently HTTP, DNS, Kafka, and supported generic Envoy- based protocols-but it does not promise arbitrary visibility for every application protocol. SSH, Telnet, and FTP cannot simply be assumed to receive native semantic parsing.
An operational caveat is that L7 visibility rules also affect policy enforcement: they are not merely passive packet logging instructions.
Official references
Layer 7 Protocol Visibility , Cilium Envoy
Study Guide topic: L7 proxy redirection, CiliumNetworkPolicy, protocol parsing, and Hubble visibility.
NEW QUESTION # 64
Which Cilium configuration is recommended to help identify the correct configuration of network policies without interrupting workload communications?
Answer: A
Explanation:
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.
NEW QUESTION # 65
A Kubernetes cluster is not currently running Cilium as a CNI, but the user would like to benefit from Hubbies observability capabilities on your cluster. Which one of the following options is NOT possible?
Answer: B
Explanation:
Technical explanation
Hubble is Cilium's integrated observability layer and consumes flow events produced by Cilium's eBPF datapath and embedded Hubble servers. The Hubble CLI is only a client; downloading its binary does not install a standalone datapath or create flow data on a cluster that lacks Cilium. Option B is therefore the operation that is not possible.
The other approaches represent recognized Cilium deployment or migration models. A direct migration can replace the CNI configuration and recycle workloads or nodes, although a naive cluster-wide transition can disrupt connectivity. CNI chaining allows Cilium to operate with another CNI: the existing plugin continues to provide basic connectivity and IP address management, while Cilium attaches eBPF programs to the created interfaces to provide visibility, policy, and other functions. Cilium also documents migration through dual overlays. In that model, the old and new networks coexist temporarily, nodes are moved in a controlled sequence, and workloads attached to either overlay retain connectivity when the documented addressing and routing requirements are met.
The supplied bank incorrectly marks A. The verified answer is B because Hubble requires Cilium-managed observability data.
Official references
Setting up Hubble Observability ; CNI Chaining ; Migrating a cluster to Cilium .
Study Guide topic: Installation and Configuration.
NEW QUESTION # 66
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