Some of this is redundant with [[Determine_the_current_TCP--IP_settings_on_a_system]].
In the book, these sections are next to each other. So maybe first show how to see settings.
And second section cover how to set. --reed

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Notes from Jacob K:

hosts: host name database (/etc/hosts)

Modify TCP/IP settings:

Temporarily:

Permanently: set variables in rc.conf

""hostname="host.example.com"
""network_interfaces="fxp0 lo0"
""defaultrouter="10.1.1.254"
""ifconfig\_fxp0="inet 10.1.1.1 netmask 255.255.255.0"

*or*

""ifconfig_fxp0="DHCP"