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| Section | Weight | Objectives |
|---|---|---|
| BGP and External Networking | 6% | - Egress Connectivity Requirements
|
| Architecture | 20% | - Understand the Role of Cilium in Kubernetes Environments
|
| Network Policy | 18% | - Interpret Cilium Network Policies and Intent
|
| Cluster Mesh | 10% | - Understand the Benefits of Cluster Mesh for Multi-cluster Connectivity
|
| eBPF | 10% | - Understand the Role of eBPF in Cilium
|
| Installation and Configuration | 10% | - Know How to Use Cilium CLI to Query and Modify the Configuration
|
| Service Mesh | 16% | - Know How to use Ingress or Gateway API for Ingress Routing
|
| Network Observability | 10% | - Understand the Observability Capabilities of Hubble
|
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NEW QUESTION # 31
Which one of the following best describes the role Cilium provides in Kubernetes?
Answer: A
Explanation:
Technical explanation
Cilium functions as a Kubernetes Container Network Interface implementation. When Kubernetes creates or removes a pod sandbox, the container runtime invokes the configured CNI plugin. Cilium establishes the pod' s network connectivity, connects the workload to the node's networking environment, allocates or obtains an address through the configured IPAM mode, and coordinates the endpoint with the Cilium agent. Its eBPF datapath then supplies routing, service load balancing, policy enforcement, and network visibility.
Cilium provides substantially more functionality than the minimum CNI contract, but those additional capabilities do not change its primary Kubernetes networking role. Hubble supplies integrated network observability, yet Cilium is not merely a container-metrics monitor. Resource utilization such as CPU and memory is normally handled through Kubernetes metrics and monitoring systems.
Cilium is also not a Container Storage Interface. CSI drivers manage storage volumes, attachment, mounting, and lifecycle operations, which are unrelated to Cilium's primary responsibilities. Nor is Cilium simply a pod- operation logging mechanism. It can emit datapath events and diagnostic logs, but those are supporting capabilities.
Accordingly, D provides the correct architectural classification for Cilium in a Kubernetes cluster.
Official references
Introduction to Cilium and Hubble ; Cilium Helm Installation .
Study Guide topic: Architecture.
NEW QUESTION # 32
Which command is used to enable logging at the debug log level of Cilium agents7
Answer: B
Explanation:
Technical explanation
cilium config set debug true follows the supported Cilium CLI configuration syntax and sets the debug configuration key to true . The cilium config set command accepts a key/value pair and, by default, restarts the Cilium pods so that the changed configuration is applied. The Cilium configuration documentation defines debug as the setting that enables full debug mode. This increases agent logging verbosity and causes eBPF programs to emit additional visibility events for diagnostic use.
Options A, B, and D do not match documented Cilium CLI command structures. There is no cilium log level
--set=debug command in the Cilium CLI hierarchy, and neither cilium logging.level=debug nor cilium logging debug is valid configuration syntax. A Helm-managed installation may also enable debugging through the chart value debug.enabled=true , but that does not make any of the alternative commands correct.
Debug mode should be enabled deliberately because it increases log volume and may generate additional datapath visibility information. After troubleshooting, operators should normally restore the previous setting to avoid unnecessary operational overhead.
The supplied answer key incorrectly identifies B. The verified answer is C.
Official references
Cilium configuration ; Cilium CLI `config set` ; Helm values .
Study Guide topic: Installation and Configuration.
NEW QUESTION # 33
What is true about Layer 7 protocol visibility in Cilium?
Answer: A
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 # 34
Which Cilium command should you execute to gather network-related troubleshooting information from your Kubernetes cluster?
Answer: A
NEW QUESTION # 35
Which Cilium command should you execute to gather network-related troubleshooting information from your Kubernetes cluster?
Answer: A
Explanation:
Technical explanation
The intended answer is D, but the option contains a source-bank typographical error. The valid command is cilium sysdump , not cilium sysduwp . Read literally, none of the four displayed commands exactly answers the question.
The Cilium CLI's sysdump operation gathers cluster-wide troubleshooting material, including Cilium configuration and endpoint state, agent and operator logs, Kubernetes workload information, routing and interface details, kernel messages, service state, policies, and selected eBPF-map output. This consolidated archive is the preferred diagnostic package when investigating Kubernetes networking or preparing a support report.
cilium status --verbose provides expanded health and deployment status, but it does not collect the comprehensive diagnostic archive requested. debuginfo is associated with the in-agent debug client- currently documented as cilium-dbg debuginfo -and produces useful local-agent API information; in Kubernetes environments it is already included as part of the system dump. cilium bugtool is not the current cluster-wide Cilium CLI command requested here.
For an exam-ready correction, option D should read cilium sysdump .
Official references
Cilium Troubleshooting and Sysdump
Study Guide topic: Cilium CLI troubleshooting, system dumps, and diagnostic collection.
NEW QUESTION # 36
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