Configure a machine as a router. 

Involves creating hostname and hosts file and adding addresses.

"How to Configure a Machine as a Router"

Select static routing on a host that is a network client. 

Involves adding an entry into the defaultrouter file.

"How to Select Static Routing on a Host That Is a Nework Client"

Select dynamic routing on a host that is a network client. 

Involves editing entries in the defaultrouter file.

"How to Select Dynamic Routing on a Host That Is a Nework Client"

Force a machine to be a router. 

Involves creating a gateways file.

"How to Force a Machine to Be a Router"