Mark has been assigned a project to configure a wireless network for a company.

Mark has been assigned a project to configure a wireless network for a company. The network should contain a Windows 2003 server and 30 Windows XP client computers. Mark has a single dedicated Internet connection that has to be shared among all the client computers and the server. The configuration needs to be done in a manner that the server should act as a proxy server for the client computers.

Which of the following programs can Mark use to fulfill this requirement?