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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Service Mesh | 16% | - Know How to use Ingress or Gateway API for Ingress Routing
|
| Topic 2: BGP and External Networking | 6% | - Egress Connectivity Requirements
|
| Topic 3: eBPF | 10% | - Understand the Role of eBPF in Cilium
|
| Topic 4: Architecture | 20% | - Understand the Role of Cilium in Kubernetes Environments
|
| Topic 5: Cluster Mesh | 10% | - Understand the Benefits of Cluster Mesh for Multi-cluster Connectivity
|
| Topic 6: Network Policy | 18% | - Interpret Cilium Network Policies and Intent
|
| Topic 7: Installation and Configuration | 10% | - Know How to Use Cilium CLI to Query and Modify the Configuration
|
| Topic 8: Network Observability | 10% | - Understand the Observability Capabilities of Hubble
|
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NEW QUESTION # 43
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?
Answer: B
Explanation:
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.
NEW QUESTION # 44
You want to consult the current Cilium configuration using the Cilium CLI. Which command should you use?
Answer: A
Explanation:
Technical explanation
cilium config view is the Cilium CLI command intended to display the current configuration. It reads the configuration associated with the selected Kubernetes context, Cilium namespace, and Helm release and presents the relevant settings for inspection. This makes D the direct answer.
cilium status performs a different function. It reports the health and readiness of Cilium components such as the agent DaemonSet, operator, Envoy, Hubble Relay, and Cluster Mesh. Although status output may reveal a small amount of deployment information, it is not a complete configuration-viewing command.
cilium sysdump collects a comprehensive troubleshooting archive containing Kubernetes resources, component logs, command output, configuration data, and other diagnostic evidence. It is appropriate when preparing a support bundle, but it is unnecessarily broad for simply consulting the current configuration.
cilium context deals with Kubernetes context selection or inspection rather than displaying Cilium's configured values.
The Cilium CLI organizes configuration operations under the cilium config command group. Related subcommands include set , delete , and view . Because the requested action is read-only inspection of the existing settings, view is the appropriate subcommand.
Official references
Cilium CLI `config view` .
Study Guide topic: Installation and Configuration.
NEW QUESTION # 45
Which statement about Cilium's identity-based security model is correct?
Answer: C
Explanation:
Technical explanation
Cilium derives a workload's security identity from its security-relevant labels. Network policies then refer to workload characteristics such as application, role, environment, namespace, or service account rather than depending exclusively on transient pod IP addresses. The identity is associated with traffic in the Cilium datapath and validated when policy is enforced. This makes B the accurate description.
The identity is not limited to a single pod. Endpoints that have the same set of identity-relevant labels can share the same numeric security identity, including endpoints located on different cluster nodes. This reduces policy-map growth and allows policy to scale with logical application groups rather than with the number of pod addresses. Namespace information is normally among the labels used to derive identity, but that does not make an identity inherently "tied to a single namespace" as option A states.
Options C and D invert Cilium's design. IP addresses remain necessary for packet delivery, but they are not the primary security identifier for Cilium-managed workloads. Pods can be recreated and assigned new addresses while retaining the same relevant labels and therefore the same security intent. Decoupling identity from addressing is precisely what improves scalability and operational stability.
Official references
Cilium Terminology and Identity ; Introduction to Cilium and Hubble .
Study Guide topic: Architecture.
NEW QUESTION # 46
a requirement to achieve service discovery and load balancing across clusters with Cluster Mesh?
Answer: A
Explanation:
Technical explanation
Every cluster participating in a Cilium Cluster Mesh must have a unique cluster name and numeric cluster ID.
The numeric ID becomes part of Cluster Mesh security identities and allows Cilium to distinguish identities originating in different clusters. Reusing an ID would create ambiguity in endpoint identity, policy enforcement, and synchronized service information. Current documentation permits IDs from 1 through 255 under the default scaling configuration.
Geographical colocation is not required. Cluster Mesh is specifically designed to extend connectivity, policy, service discovery, and load balancing across clusters that may reside in different regions, clouds, or premises, provided the documented network-connectivity requirements are satisfied. The clusters also do not need to use an identical Kubernetes distribution or exact Kubernetes version.
Option C is unnecessarily strict. Current Cilium documentation permits connected clusters to differ by no more than one minor Cilium release; exact version equality is not mandatory. Other prerequisites include unique and non-conflicting PodCIDRs, compatible datapath modes, node connectivity, and appropriate inter- cluster communication.
The supplied bank incorrectly marks A. The verified answer is D.
Official references
Setting up Cluster Mesh .
Study Guide topic: Cluster Mesh.
NEW QUESTION # 47
When considering changing an existing cluster's IPAM (IP address management) mode, what is the safest path?
Answer: D
Explanation:
Technical explanation
The official IPAM documentation expressly states that the safest way to change IPAM mode is to install a fresh Kubernetes cluster using the required new IPAM configuration. A live cluster already contains allocated workload addresses, node routing state, Cilium endpoint state, service state, and potentially cloud-provider resources that depend on the active allocator. Replacing the allocator in place can invalidate these assumptions and cause persistent connectivity disruption rather than merely a short agent restart.
Updating a Kubernetes Node object does not generally convert Cilium's IPAM mode. The responsible resource and allocation behavior depend on the selected mode: Kubernetes host-scope IPAM, cluster-pool IPAM, multi-pool IPAM, CRD-backed modes, and cloud-specific allocators manage address information differently. Restarting agents after changing a configuration value likewise does not constitute a safe migration plan, because existing endpoints and routes may retain state created under the former allocator.
Cilium advises against changing the IPAM mode of an existing cluster unless a specifically documented migration procedure applies. The currently documented exception is migration from cluster-pool IPAM to multi-pool IPAM. As the question provides no such constrained scenario, D is the unambiguously safest answer.
Official references
IP Address Management .
Study Guide topic: Installation and Configuration.
NEW QUESTION # 48
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