New Release XK0-005 Linux+ Questions

A is correct syntax to bring up a network interface.

Incorrect Options:

B, C, D: Invalid or misused ip link subcommands.

Comprehensive and Detailed Explanation From Exact Extract:

The correct way to temporarily allow specific services in a particular zone with firewalld is to use firewall-cmd --add-service=service --zone=zone. Multiple services can be specified in curly braces and separated by commas. The correct syntax is:

bash

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firewall-cmd --add-service={dns,http,https} --zone=internal

This command will allow DNS (port 53), HTTP (port 80), and HTTPS (port 443) through the firewall for the "internal" zone temporarily (for the current runtime session).

Other options:

A. The command syntax is incorrect; firewalld is a service, not a command-line tool.

B. iptables does not use the --enable-service flag, nor does it have zones in this way.

D. systemctl mask disables services, and the rest of the command is invalid.

The docker logs command is used to fetch the logs of a container. If the error output is not showing for a running container, the docker logs command can be used to view these details56.

SSO (Single Sign-On) allows users to authenticate once and gain access to multiple systems or services without re-authenticating. This improves user experience and reduces the number of credentials users must manage.

Source: CompTIA Linux+ XK0-005 Exam Objectives, Domain 4: Security