What type of information is displayed by using the command 'show system dns'?

The command 'show system dns' is specifically designed to provide details about the Domain Name System (DNS) settings configured on the device. It reveals crucial information such as the addresses of DNS servers that the system is using for hostname resolution. This information is essential for understanding how the device is handling DNS queries and which servers it relies on for converting domain names into IP addresses.

In contrast, the other choices pertain to different areas of system information. Network traffic statistics focus on the flow and performance of data across the network, available firmware updates relate to the software version running on the device, and device hardware specifications provide details about the physical components of the system. Each of these categories serves a different purpose and is accessed through different commands, reinforcing that 'show system dns' is specifically focused on DNS server addresses.