Docker DCA Exam With Confidence Using Practice Dumps

 Docker Content Trust (DCT) is a feature that allows users to verify the integrity and publisher of container images they pull or deploy from a registry server, signed on a Notary server12. DCT does not verify or encrypt the Docker registry TLS, which is a separate mechanism for securing the communication between the Docker client and the registry server. The purpose of DCT is to ensure that the images are not tampered with or maliciously modified by anyone other than the original publisher3. References:

Content trust in Docker | Docker Docs

Docker Content Trust: What It Is and How It Secures Container Images

Automation with content trust | Docker Docs

The strategy will not successfully accomplish mounting the /data directory on your laptop into a container. The containers. Mounts. hostBinding: /data is not a valid syntax for specifying a bind mount in a Kubernetes container specification. According to the Kubernetes documentation), the correct way to mount a host directory into a container is to use a hostPath volume, which takes a path parameter that specifies the location on the host. For example, to mount the /data directory on your laptop into a container at /var/data, you can use the following YAML snippet:

spec:

containers:

-name:my-container

image:my-image

volumeMounts:

-name:data-volume

mountPath:/var/data

volumes:

-name:data-volume

hostPath:

path:/data

Volumes), Use bind mounts)

The user namespace is a Linux kernel namespace that is disabled by default and must be enabled at Docker engine runtime to be used. The user namespace allows the host system to map its own uid and gid to some different uid and gid for containers’ processes. This improves the security of Docker by isolating the user and group ID number spaces, so that a process’s user and group ID can be different inside and outside of a user namespace1. To enable the user namespace, the daemon must start with --userns-remap flag with a parameter that specifies base uid/gid2. All containers are run with the same mapping range according to /etc/subuid and /etc/subgid3. References:

Isolate containers with a user namespace

Using User Namespaces on Docker

Docker 1.10 Security Features, Part 3: User Namespace