Satellite 6.4

Im getting ready to install Sat 6.4 when it comes out. Do you install with all the options "dhcp, dns, tftp"? I definetly need tftp for kikstart purposes, but not sure if we need dns/dhcp in our environment. Can you install all the options and use what you want?

Also do you need to configure firewall on the satellite host? Or can we just use our network firewall?