Which of the following is an important step in the initial stages of deploying a host-based firewall?

Selecting between identification and authentication is an access control and identity management decision that is unrelated to the configuration of firewall traffic rules.

A host-based firewall operates on a default-deny or default-allow basis, and its effectiveness depends entirely on correctly specifying which traffic is legitimate. Determining exceptions (allowed applications and ports) must happen first because misconfigured exceptions can either block critical services and disrupt operations, or leave security gaps if too permissive. This exceptions list becomes the core rule set that the firewall enforces.

Choosing an encryption algorithm pertains to data-at-rest or data-in-transit protection such as VPNs or disk encryption, not to firewall rule configuration.

Setting time-of-day restrictions is an access control policy applied to user logon or resource access, not a fundamental step in configuring a host-based firewall's traffic filtering rules.