Network Observability Questions
Practice questions for Network Observability topic in Cilium Certified Associate. 20 questions covering this domain.
Without Hubble Relay, what scope of visibility does the Hubble API provide?
What is Hubble in the Cilium ecosystem?
A policy troubleshooting session needs only dropped flows to a specific pod, not every flow in the cluster. Which command pattern is the best fit?
What network requirement must be met before enabling Hubble with Relay?
An engineer wants to verify access to the Hubble API from a workstation using the CLI. Which workflow matches the docs?
Which Hubble component must be deployed in addition to the per-node Hubble API to enable cluster-wide flow visibility from a single endpoint?
A developer wants to enable Layer 7 protocol visibility for HTTP traffic on a specific pod without writing a full L7 network policy. Which Cilium anno...
An operator wants to observe all DNS queries made by a pod to external domains in real time using the Hubble CLI. Which command filters Hubble flows t...
A site reliability engineer notices that the Hubble CLI returns only flows from a single node even after hubble-relay is running. After running `hubbl...
An SRE team uses the Hubble UI to investigate a service communication issue. They see a red edge in the service map between `frontend` and `backend`. ...
In which scenario can Hubble provide visibility across more than one cluster?
Why is Hubble especially useful for troubleshooting service communication in Cilium-managed clusters?
Where does the Hubble server run in a Cilium deployment?
What does Hubble UI provide when used with relay-based visibility?
Before Hubble Relay is deployed, how does the Hubble CLI typically access the local Hubble API on a node?
Which Hubble CLI filter shows only traffic encrypted with WireGuard or IPsec?
A compliance team wants L7 visibility but must avoid exposing query strings, credentials, and sensitive headers in flow records. What is the documente...
An operator expects to see inbound DNS request visibility in Hubble for a Pod. Which official limitation matters here?
When using hubble status with the automatic port-forward flag, which local address is used by default for Hubble Relay access?
Which Hubble component provides a graphical service dependency and connectivity map using relay-based visibility?
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