Cilium-Associate인기덤프, Cilium-Associate 100％시험패스공부자료

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Linux Foundation Cilium-Associate Exam Syllabus Topics:

Section	Weight	Objectives
Topic 1: Architecture	20%	- Cilium core architecture and components - CNI integration and kube-proxy replacement
Topic 2: Installation and Configuration	10%	- Post-install validation and connectivity testing - Deployment methods (Helm, cilium-cli)
Topic 3: BGP and External Networking	6%	- External gateway integration - BGP peering and service advertisement
Topic 4: Service Mesh	16%	- Sidecar vs sidecarless architecture - Ingress and Gateway API integration - Transparent traffic encryption
Topic 5: Cluster Mesh	10%	- Multi-cluster connectivity and service discovery - Cross-cluster load balancing and failover
Topic 6: eBPF	10%	- eBPF-based networking, security, and observability - eBPF fundamentals and relevance to Cilium
Topic 7: Network Observability	10%	- Hubble UI and troubleshooting basics - Layer 7 visibility and flow monitoring - Hubble architecture and CLI usage
Topic 8: Network Policy	18%	- Identity-aware and L3–L7 policy models - Policy enforcement modes - Cilium vs Kubernetes network policies

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최신 Cloud & Containers Cilium-Associate 무료샘플문제 (Q42-Q47):

질문 # 42
You need to expose an application over HTTPS on your Cilium-managed Kubernetes cluster The security team has specifically asked for traffic to be encrypted all the way from the external clients to the Service.
Which option should you use?

A. Enable the Ingress feature and use the TLS Terminate mode and HTTPRoute route type.
B. Enable the Gateway API feature and use the TLS Terminate mode and HTTPRoute route type.
C. Enable the Ingress feature and use the TLS Passthrough mode and TLSRoute route type.
D. Enable the Gateway API feature and use the TLS Passthrough mode and TLSRoute route type.

정답：D

설명：
Technical explanation
The requirement is that traffic remain encrypted all the way from the external client to the backend Service .
Therefore, TLS must not terminate at the Cilium Gateway/Envoy proxy .
With TLS Passthrough , Cilium forwards the encrypted TLS stream to the backend without decrypting the application traffic. Envoy can inspect the TLS ClientHello/SNI sufficiently to select the appropriate backend, but the TLS session itself continues to the Service. Cilium specifically supports TLS passthrough with the Gateway API TLSRoute resource .
By contrast, TLS Terminate + HTTPRoute decrypts the connection at the Gateway. Although a separate encrypted connection to the backend can be configured in some architectures, that is not the same as preserving the original end-to-end TLS session requested here. Cilium's HTTPS Gateway examples use TLS termination when the Gateway itself handles the certificate.
Study Guide topic: Service Mesh.

질문 # 43
Which one of the following statements accurately describes the identity-based network security model used by Cilium?

A. Security is based on the identity of a pod. The security ID is manually set by the operator and cannot be shared between pods.
B. Security is based on the identity of a pod, which Is derived through its IP address. This identity cannot be shared between pods.
C. Security is based on the identity of a pod, which is derived through labels. This identity can be shared between pods.
D. Security is based on the identity of a pod, which is derived through annotations. This Identity can be shared between pods.

정답：C

설명：
Technical explanation
Cilium derives an endpoint's security identity from its security-relevant labels rather than from its current IP address. When multiple endpoints possess the same relevant label set, they receive and share the same numeric security identity. This enables policies to follow an application as pods are recreated, rescheduled, or scaled across nodes.
In Kubernetes, the Cilium agent obtains workload metadata through the Kubernetes API and associates the pod's labels with the corresponding Cilium endpoint. Identity allocation converts the relevant label set into a cluster-wide identity. Policy enforcement then matches that identity in the eBPF datapath instead of depending exclusively on short-lived pod addresses.
Option A incorrectly makes the IP address the source of identity and says that identities cannot be shared.
Option B incorrectly identifies annotations as the identity foundation. Annotations may configure behavior, but Cilium's security model is label-based. Option D is also incorrect because operators do not ordinarily assign each pod's numeric security identity manually. Identity allocation and lifecycle management are automatic.
Official references
Cilium Terminology and Identities , Limiting Identity-Relevant Labels
Study Guide topic: Label-derived identities and identity-based policy enforcement.

질문 # 44
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?

A. This policy will deny traffic from a Pod named ship in ns-cca namespace in clusterl to a Pod named base in ns-cca namespace in cluster2.
B. This policy will allow traffic from a Pod named ship in ns-cca namespace in clusterl to a Pod named base in ns-cca namespace in cluster2.
C. This policy will deny traffic from a Pod named ship in ns-cca namespace in clusterl to a Pod named base in default namespace in cluster2.
D. This policy will allow traffic from a Pod named ship in ns-cca namespace in clusterl to a Pod named base in default namespace in cluster2.

정답：B

설명：
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.

질문 # 45
Which one of the following service mesh features and use cases is natively supported by Cilium?

A. AP| request limiting
B. API authorization
C. Fault injection, such as injection of delay
D. Layer 7 Load Balancing of gRPC

정답：A

설명：
Technical explanation
The intended answer is A because API request limiting corresponds to rate limiting, which Cilium identifies as a core Layer 7 traffic-management capability. Cilium combines its eBPF datapath with Envoy for application-layer processing. The official Service Mesh documentation expressly includes rate limiting among the functions that must understand protocols such as HTTP, REST, gRPC, and WebSocket. It is therefore not merely packet-rate policing at Layer 3 or Layer 4; it can be applied with application-protocol context.
However, this question is no longer valid as a strict single-answer item. Current Cilium documentation also describes proxy-based Layer 7 load balancing as useful for gRPC and provides an Envoy-backed implementation for Kubernetes Services. Consequently, option C is also supportable under the current product documentation, although the feature is identified as beta. API authorization and fault-delay injection are not presented as equivalent first-class Cilium Service Mesh use cases in the cited feature overview.
For certification-bank purposes, retain A as the intended answer, but revise option C or qualify it to restore a unique correct choice.
Official references
Service Mesh ; Proxy Load Balancing for Kubernetes Services .
Study Guide topic: Service Mesh.

질문 # 46
What is the default policy enforcement behavior?

A. If any rule selects an Endpoint and the rule has an ingress section, the Endpoint goes Into default allow at Ingress, f any rule selects an Endpoint and the rule has an egress section, the Endpoint goes into default allow at egress.
B. If any rule selects an Endpoint and the rule has an ingress section, the Endpoint goes Into default deny at egress. f any rule selects an Endpoint and the rule has an egress section, the Endpoint goes into default deny at ingress.
C. If any rule selects an Endpoint and the rule has an ingress section, the Endpoint goes Into default allow at egress, f any rule selects an Endpoint and the rule has an egress section, the Endpoint goes into default allow at ingress.
D. If any rule selects an Endpoint and the rule has an ingress section, the Endpoint goes into default deny at ingress. f any rule selects an Endpoint and the rule has an egress section, the Endpoint goes into default deny at egress.

정답：D

설명：
Technical explanation
In Cilium's default policy-enforcement mode, an endpoint initially permits ingress and egress traffic.
Enforcement changes independently for each direction when a policy selects that endpoint. If a selecting rule contains an ingress section, the endpoint enters default-deny mode for ingress. If a selecting rule contains an egress section, it enters default-deny mode for egress. Only traffic explicitly permitted by the applicable policy rules remains allowed in the restricted direction.
This per-direction behavior is important. An ingress-only policy does not automatically restrict egress, and an egress-only policy does not automatically restrict ingress. Options A and B reverse the relationship between the rule section and the direction being enforced. Option C incorrectly states that selection places the endpoint into default-allow mode; default allow describes the endpoint's condition before it is selected by an enforcing policy.
Cilium also supports always and never enforcement modes. In always , enforcement applies even to endpoints not selected by policy. In never , policy enforcement is disabled. Policies can additionally use enableDefaultDeny for specialized visibility configurations, but those controls do not change the normal default behavior described in the question.
Official references
Policy Enforcement Modes .
Study Guide topic: Network Policy.

질문 # 47
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