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Linux Foundation Cilium-Associate Exam Syllabus Topics:

Section	Weight	Objectives
Architecture	20%	- IP Address Management and Datapath Models - Cilium Architecture and Components
Network Observability	10%	- Hubble and Layer 7 Visibility - Hubble CLI and UI
Cluster Mesh	10%	- Service Discovery and Load Balancing - Multi-Cluster Connectivity
Installation and Configuration	10%	- Installation and Connectivity Testing - Cilium CLI and Configuration
Network Policy	18%	- Identity-Based Network Security - Policy Rules and Enforcement
eBPF	10%	- eBPF Role and Benefits - eBPF and iptables-Based Networking
BGP and External Networking	6%	- Connecting Cilium Clusters to External Networks - Egress Connectivity
Service Mesh	16%	- Traffic Encryption and Service Mesh Architectures - Ingress and Gateway API

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Linux Foundation Cilium Certified AssociateCCA Sample Questions (Q31-Q36):

NEW QUESTION # 31
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 deny at ingress. f any rule selects an Endpoint and the rule has an egress section, the Endpoint goes into default deny 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 allow at Ingress, f any rule selects an Endpoint and the rule has an egress section, the Endpoint goes into default allow at egress.

Answer: A

NEW QUESTION # 32
Which statement is true of both the Ingress Controller and Gateway API?

A. It provides portable Layer 7 north-south routing logic for Kubernetes workloads.
B. Its features are commonly extended by using resource annotations.
C. Its routing logic can be restricted to a single namespace.
D. It is role-oriented, with some resources for administrators and others for users.

Answer: A

Explanation:
Technical explanation
Both Kubernetes Ingress and the north-south use of Gateway API provide declarative Layer 7 routing from clients outside the cluster to Kubernetes workloads. They express host- and path-based routing through Kubernetes resources and can be implemented by controllers such as Cilium's Envoy-based ingress implementation. A therefore captures their shared purpose most accurately.
The remaining choices describe differences rather than universal similarities. Gateway API is explicitly role- oriented: infrastructure administrators manage GatewayClass and often Gateway , while application owners manage route resources such as HTTPRoute . The Ingress API does not provide the same formal separation of administrative and application-facing resources, making C unsuitable as a statement about both.
Implementation-specific annotations are historically common with Ingress because its core API is limited.
Gateway API was deliberately designed with more expressive, portable resource fields so that implementations do not need to depend as heavily on vendor-specific annotations; D is consequently not true of both. Namespace behavior also differs because Gateway API provides controlled cross-namespace attachment and reference mechanisms. B is therefore not the defining common capability.
Official references
Cilium Kubernetes Ingress Support , Cilium Gateway API Support , Migrating from Ingress to Gateway API Study Guide topic: Kubernetes north-south routing, Ingress, and Gateway API.

NEW QUESTION # 33
After enabling Layer 7 visibility, you can now observe DNS domains and FQDN in your Hubble logs, like the one below.
Nov 16 13:52:07.279: endor/xwing-9bd8f454d-m46mm:34706 (ID:3817) < > example.com:443 (ID:
16777217) Policy denied DROPPED (TCP Flags SYN)
Which of these Hubble CLI commands could have returned the output above?

A. hubble observe --to-fqdn example.con --from-namespace endor --to-port 443 --verdict DROPPED
B. hubble obs erve --to-fqdn example.con --fro # -namespace endor --to-port 80 --verdict DROPPED
C. hubble observe --to-fqdn example.cow --from-namespace kube-system --to-port 443 --verdict DROPPED
D. hubble observe --to-fqdn example.co* --from-namespace endor --to-port 443 --verdict FORWARDED

Answer: A

Explanation:
Technical explanation
A is clearly the intended answer because its filters correspond to the displayed source namespace ( endor ), destination port ( 443 ), and verdict ( DROPPED ). However, it contains example.con , whereas the observed flow names example.com . Therefore, none of the options would literally return this exact flow if the FQDN filter is matched as written. The corrected command is:
hubble observe --to-fqdn example.com --from-namespace endor --to-port 443 --verdict DROPPED Option B is malformed in two additional places and filters port 80 rather than 443. Option C selects the wrong FQDN and source namespace. Option D requests forwarded flows, directly contradicting the Policy denied DROPPED verdict; its wildcard also does not repair the verdict mismatch.
Hubble's observe filters are cumulative: a returned flow must satisfy the specified destination FQDN, originating namespace, destination port, and verdict. Layer 7 visibility is enabled with a Cilium network policy containing the relevant L7 rules, which redirects selected traffic through the proxy so that application- level details can be reported.
Official references
Inspecting Network Flows with the Hubble CLI , Layer 7 Protocol Visibility Study Guide topic: Hubble flow filtering, FQDN visibility, namespaces, ports, and verdicts.

NEW QUESTION # 34
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 annotations. This Identity can be shared between pods.
D. Security is based on the identity of a pod, which is derived through labels. This identity can be shared between pods.

Answer: D

Explanation:
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.

NEW QUESTION # 35
As a Kubernetes user, you have deployed the following Cilium Network Policy:

Cilium Layer 7 network policy exhibit
The network policy is not having any effect. What Is the Issue?

A. The layer 7 rule requires the specification of the Layer 4 protocol in the ports section.
B. The app.kubernetes.io/name label should be referred to without the k8s: prefix
C. The backend and app-frontend workloads are in different namespaces.
D. Port 80 is a privileged port and cannot be used in network policies.

Answer: A

Explanation:
Technical explanation
The policy attaches an HTTP Layer 7 rule to port 80 but omits protocol: TCP from the associated ports entry.
HTTP policy is layered on a Layer 4 TCP rule, and the documented Cilium form explicitly identifies TCP before specifying the HTTP method and path. D therefore identifies the configuration defect intended by the question.
The cross-namespace source selection is valid. The policy resides in namespace back and selects backend pods there. Its fromEndpoints selector explicitly includes k8s:io.kubernetes.pod.namespace: blog , allowing it to select matching app-frontend endpoints in that other namespace. Option A is consequently not an error.
The k8s: source prefix in k8s:app.kubernetes.io/name is also valid Cilium label syntax and identifies the Kubernetes label source, making B false. Port 80 may be used in a Cilium policy; the privileged-port restriction concerns which processes may bind low-numbered ports under operating-system permissions, not whether a network policy can reference them.
The corrected port entry should contain port: "80" together with protocol: TCP .
Official references
Cilium Layer 7 Policies , Kubernetes Constructs in Cilium Policy
Study Guide topic: Combining Layer 4 port rules with Layer 7 HTTP policies.

NEW QUESTION # 36
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