A Junior Linux Administrator Is Updating Local Name Resolution to Support

question 68

Multiple Choice

A junior Linux administrator is updating local name resolution to support IPv6. The administrator issues the command cat /etc/hosts and receives the following output: 127.0.0.1      localhost Which of the following actions should the administrator perform to accomplish this task?

• A) Modify the /etc/hosts file, and add the ipv6 localhost entry to the file. Modify the /etc/hosts file, and add the ipv6 localhost entry to the file.
• B) Modify the /etc/hosts file, and add the ::1 localhost entry to the file. ::1 localhost
• C) Modify the /etc/hosts file, and add the ipv4 localhost entry to the file. ipv4 localhost
• D) Modify the /etc/hosts file, and add the 0.0.0.0 localhost entry to the file. 0.0.0.0 localhost

---

Definitions:

Stratospheric Ozone

A layer of ozone molecules located in the Earth's stratosphere, protecting life by absorbing most of the sun's harmful ultraviolet radiation.

UVB

Ultraviolet B light, a component of sunlight with wavelengths between 280-315 nm, known for its role in vitamin D synthesis and skin tanning.

CFCs

Chlorofluorocarbons, compounds that were widely used as refrigerants and aerosol propellants but are harmful to the ozone layer.

Sulfur Oxides

Compounds formed from the combination of sulfur and oxygen, often produced by burning fossil fuels, and are significant contributors to pollution and acid rain.