What is required to resolve hostnames in logs on a FortiAnalyzer?

To resolve hostnames in logs on a FortiAnalyzer, it is essential to have a DNS server configured. This configuration enables the FortiAnalyzer to translate IP addresses into human-readable names, facilitating easier identification of devices associated with those IPs in the log entries. Without a working DNS server, the FortiAnalyzer would only display IP addresses in the logs instead of the corresponding hostnames, which could hinder the analysis and monitoring of network events.

The other options do not provide the necessary functionality for hostname resolution. Static IP settings would not resolve to hostnames as they are merely fixed addresses without the ability to resolve into names. Manually entering hostnames into logs could be cumbersome and impractical as it does not provide a dynamic solution. Lastly, while local DNS cache adjustments can help with efficiency, they do not replace the requirement for a proper DNS server configuration necessary for initial hostname resolution.