Using the basic out-of-the-box DHCP configuration to get online fast when available on your network
Out-of-the-box DHCP addressing will give you the IP addressing you need when physically connected to a network with a router and DHCP server running in order to obtain an IP automatically and connect to the network. This allows you to get online quickly without the need to know the connectivity settings such as subnet, gateway, or routing information.
Using DHCP at initial interface connectivity provided by an external source
When you first fire up your computer and plug it into the network, by default, most systems are configured to try to use DHCP. This handshake method allows for connectivity to the internet to occur faster and without direct intervention. For instance, in RHEL, when you fire up the interface when installing it, you will automatically have the configuration set to DHCP. This is due to most users having a serving DHCP server. This means that a handshake occurs...