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Question 31 - CAS-004 discussion

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A security analyst is researching containerization concepts for an organization. The analyst is concerned about potential resource exhaustion scenarios on the Docker host due to a single application that is overconsuming available resources.

Which of the following core Linux concepts BEST reflects the ability to limit resource allocation to containers?

A.
Union filesystem overlay
Answers
A.
Union filesystem overlay
B.
Cgroups
Answers
B.
Cgroups
C.
Linux namespaces
Answers
C.
Linux namespaces
D.
Device mapper
Answers
D.
Device mapper
Suggested answer: B

Explanation:

Cgroups (control groups) is a core Linux concept that reflects the ability to limit resource allocation to containers, such as CPU, memory, disk I/O, or network bandwidth. Cgroups can help prevent resource exhaustion scenarios on the Docker host due to a single application that is overconsuming available resources, as it can enforce quotas or priorities for each container or group of containers. Union filesystem overlay is not a core Linux concept that reflects the ability to limit resource allocation to containers, but a technique that allows multiple filesystems to be mounted on the same mount point, creating a layered representation of files and directories. Linux namespaces is not a core Linux concept that reflects the ability to limit resource allocation to containers, but a feature that isolates and virtualizes system resources for each process or group of processes, creating independent instances of global resources. Device mapper is not a core Linux concept that reflects the ability to limit resource allocation to containers, but a framework that provides logical volume management, encryption, or snapshotting capabilities for block devices. Verified

Reference: https://www.comptia.org/blog/what-is-cgroups https://partners.comptia.org/docs/default-source/resources/casp-content-guide

asked 02/10/2024
ahmad hafiz
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