First you have to configure your NIC card, preferably with a static IP address.
Then, tell the webserver software which port and which address to listen on.
Localhost is always IP address 127.0.0.1. This is also known as the loopback address because every machine uses this same address to refer to itself. You do not have to do anything special to set this up. That is; you do not require a DNS (domain name server) to resolve the localhost name to IP address 127.0.0.1 because it is "hard-wired". If you have a local webserver running, entering "localhost" or "127.0.0.1" in your browser will bring up the default page for that server. Other machine's on your network can also access your local webserver, but they must use your machine's local area address or the machine name to access it (if they use localhost they'll simply refer to themselves). If you do not have a webserver running, your browser will simply tell you that the web page is not available. Setting up a webserver is simply a matter of installing one. Consult the webserver documentation for information on configuring it.
ifconfig <if device> inet <ip address>
No, it is not. An IP address is made up of a set of 4, three digit numbers, separated by a dots.
It would be difficult to know what the original address was as it would depend on the network it was been used on and how the addresses were being set up and how the site was being set up. If you want to find an IP address for Facebook, you can find it using the site at the link below.
You could set up a cron job to run every five minutes that compares your ip address to a log file . If it is the same it ignores it and if it is different it sends you an email and logs the new ip address.
An Exchange Server should be set up without a static IP address to best serve the company. When a static IP address is not configures by your senior administrator, then access while traveling will be allowed. With the static IP, access is only granted when working from that IP.
APIPA stands for Automatic Private IP Address Generally it will be in the range 169.254.0.1 up to 169.254.255.254 (subnet of 255.255.0.0) This is the IP address a computer gets when it is set up pick up an IP address automatically and there is no DHCP server... or the computer can't see a router. The computer will be able to connect to any other computer on the network with an IP in the same range, but will NOT be able to connect to the internet.
In a LAN, setting up an ip address manually (which makes it a static ip address) ensures that the ip address won't be automatically changed on that machine. Makes it ideal for servers or administrative computers.
an Ip address that is being looked up
If your connected wireless, you just need to set it up again.
you can set up another account or a different computer, OR change your IP address
The Number that Identifies all computers connected to a Network with Internet Access is called the I.P. Address. If you search Google for "IP Address" it will come up with something that says "Your Public IP Address is ..." (... will be where your IP address is)