and this entry is flashing. What does this mean?
It means that the file ../networking/ifconfig-lo which the link ifconfig-lo.rpmsave points to does not exist.
But interface 'lo' is loopback, you normally don't need to do anything with it.
What you need is an IP for your nic, eth0 (do you have more than one?) Then you need an entry in /etc/hosts to map servername w IP.
Check what IP you have:
# ifconfig (issue command as root)
There should always be an entry for 'lo', and your real nic's as 'eth0' 'eth1' etc
Could not determine the server's fully qualified domain name
This means that apache can't map name to IP, this could be done in /etc/hosts.
But! Now you have apache running, and you're using DHCP. I don't know about this setup, normally servers have static IP's.
But excuse me for asking: do you know what DHCP is, do you have a DHCP-server? I'm asking because I'm not sure how much you know about networking - I have a feeling you're "solving the wrong problem". Please return with details about your network and this computer.